Santé Publique Test

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Santé Publique Test

1 / 60

What is the correct answer about a point estimatestatement:

a. .A point estimate is always less than a population value

b. .A point estimate is a range of the sample value

c. .A point estimate is a single number

d. .A point estimate is a multiple numbers

2 / 60

What is the correct answer about a confidence interval statement:

a. The narrower the confidence interval, the less precise the point estimate

b. The narrower the confidence interval, the decreased sample size

c. The narrower the confidence interval, the more precise the point estimate

d. The narrower the confidence interval, the invalid the point estimate

3 / 60

What is the statement of specificity of a diagnostic test:

a. The ability of the test to identify correctly those who have the disease from all individuals with the disease

b. The ability of the test to identify correctly those who do not have the disease from all individuals free from the disease

c. The proportion of patients who test positive who actually have the disease.

d. The proportion of patients who test negative who are actually free of the disease

4 / 60

Below is the common screening test except one:

a. Fasting blood sugar for diabetes

b. Rapid diagnostic test

c. Pap smear for cervical dysplasia or cervical cancer

d. Fasting blood cholesterol for heart disease

5 / 60

In statistics, a sample mean:

a. All the items under investigation

b. .A set of data

c. .A portion of the sample

d. .A portion of the population

6 / 60

A normal distribution curve is determined by the (chose the correct answer):

a. Range and sample size

b. Mean and sample size

c. Range and standard deviation

d. Mean and standard deviation

7 / 60

All statements below are correct to describe the negative predictive value of a screening test except one:

a. The proportion of patients who test positive who actually have the disease.

b. The proportion of patients who test negative who are actually free of the disease

c. The proportion of negative test results that are true negative

d. Likelihood of not having the disease when test is negative.

8 / 60

If a negative predictive value was 98%, it means that:

a. Among those who had a positive screening new test, the probability of disease was 98%.

b. Among those who had a positive screening new test, the probability of disease was 2%

c. Among those who had a negative screening new test, the probability of being disease-free was 2%.

d. Among those who had a negative screening new test, the probability of being disease-free was 98%.

9 / 60

A population parameter is likely to occur (chose the correct answer):

a. Within a standard deviation of a population

b. Within the confidence interval

c. Within the range values of sample

d. Within a standard deviation of a sample

10 / 60

The Positive Predictive Value was 40% means that:

a. The prevalence rate is 44%

b. Among those who had a positive screening new test, the probability of disease was 44%.

c. The prevalence of disease was 44%

d. The incidence of disease was 44%

11 / 60

The factors that determine the width of a confidence interval are except one:

a. The means of sample

b. The desired level of confidence.

c. The sample size, n.

d. The variability in the population, usually σ estimated by s.

12 / 60

A confidence interval is describe (chose the correct answer):

a. The sampling distribution.

b. The sampling error of the estimate

c. The precision of the estimate

d. The validity of the estimate

13 / 60

What is the correct interpretation of 95% confidence interval below:

a. We can be 95% confident that the true value of population lies within this interval

b. We can be 90% confident that the true value of population lies within this interval

c. We can be 98% confident that the true value of population lies within this interval

d. We can be 99% confident that the true value of population lies within this interval

14 / 60

On the statements below what is valid statements of probability:

a. Our probability of dying is 100%

b. My probability of winning the lottery is less than 0.

c. We are 150% certain of success

d. The probability of this patient will cure is more than 100%

15 / 60

In a study of Cambodian people over 65 years of age, it is found that 255 have heart disease and 2302 do not. If a Cambodian over 65 years of age is randomly selected, what is the estimated probability that he or she has heart disease:

a. 255/(255+2302)

b. 2302/255

c. 255/2302

d. 2302/(255+2302)

16 / 60

Which below statement is not correct:

a. Point estimates are not calculated from sample.

b. Statistics are known values computed from a sample

c. Statistics are random variables because they differ from sample to sample

d. An estimate of the parameter based on observed information in the sample

17 / 60

What is the statement of negative predictive value of a diagnostic test:

a. The ability of the test to identify correctly those who do not have the disease from all individuals free from the disease

b. The proportion of patients who test positive who actually have the disease.

c. The ability of the test to identify correctly those who have the disease from all individuals with the disease

d. The proportion of patients who test negative who are actually free of the disease

18 / 60

A positive predictive value depend on:

a. The prevalence of the disease in the population tested

b. The incidence of the disease in the population tested

c. The mortality of the disease in the population tested

d. The negative predictive value of the disease in the population tested

19 / 60

What is the correct statement of positive predictive value (PPV) of a screening test:

a. The ability of the test to identify correctly those who do not have the disease.

b. The ability of the test to identify correctly those who have the disease.

c. The ability of a test to indicate which individuals have the disease and which do not.

d. The proportion of patients who test positive who actually have the disease.

20 / 60

A confidence interval estimate is (chose the correct answer):

a. .A range of values constructed from sample data

b. .A mean of values constructed from sample data

c. .A median of values constructed from sample data

d. .A standard deviation of values constructed from sample data

21 / 60

If the penalty for missing a case is high (e.g., the disease is fatal and treatment exists, or disease easily spreads) the best diagnostic test is:

a. use a cut-point with low specificity

b. Maximize true positives

c. use a cut-point with high specificity

d. use a cut-point with low sensitivity

22 / 60

Which of these is most likely to happen?

a. Event C, which has a probability of 0.5

b. Event D, which has a probability of 0.1

c. Event A, which has a probability of 25%

d. Event B, which has a probability of 0.75

23 / 60

What is the correct statement of sensitivity of a screening test:

a. The ability of a test to indicate which individuals have the disease and which do not.

b. The ability of the test to identify correctly those who have the disease.

c. The ability of the test to identify correctly those who do not have the disease.

d. The proportion of patients who test positive who actually have the disease.

24 / 60

All statements below are correct to describe the positive predictive value of a screening test except one:

a. Likelihood of not having the disease when test is negative

b. Likelihood of having the disease when test is positive.

c. The proportion of patients who test positive who actually have the disease.

d. The proportion of positive test results that are true positive.

25 / 60

On the statements below which are validstatements of probability:

a. Our probability of dying is 100%

b. We are 101% certain of success.

c. My probability of winning the lottery is less than 0.

d. We are 150% certain of success.

26 / 60

The branch of biostatistics that deals with testing of hypothesis, making predictions using data collected is called:

a. Test statistics

b. Descriptive statistics

c. Comparative biostatistics

d. Inferential biostatistics

27 / 60

Which below statement is not correct:

a. Confidence interval describes the precision of the estimate

b. The narrower the confidence interval, the less precise the point estimate

c. The narrower the confidence interval, the more precise the point estimate.

d. The confidence interval represents a range of values on either side of the estimate

28 / 60

Which statement is not true about confidence intervals?

a. An approximate formula for a 95% confidence interval is sample estimate ±margin of error.

b. .A confidence interval between 20% and 40% means that the population proportion lies between 20% and 40%.

c. .A confidence interval is an interval of values computed from sample data that is likely to include the true population value.

d. .A 99% confidence interval procedure has a higher probability of producing intervals that will include the population parameter than a 95% confidence interval procedure.

29 / 60

Students had attended a blood donor session at the University of Health Science when a new donor arrived. Blood can be classified into 4 groups: O, A, B and AB. The table below shows the number of people in each blood group. What is the probability that the next donor belongs to blood group O?

a. 46%

b. 8%

c. 3%

d. 43%

30 / 60

ការសិក្សាទៅលើសំណាកនៃនិស្សិតឆ្នាំទី២B ចំនួន១៥នាក់ រកឃើញថានិស្សិតបានចំណាយពេលសិក្សានៅបណ្ណាល័យជាមធ្យម 50 នាទី ក្នុង១ ថ្ងៃ។ គេចង់ធ្វើ hypothesis testing ដោយសរសេថា H0: រយះពេលសិក្សាក្នុងបណ្ណាល័យស្មើ ៦០នាទី និង Ha: រយះពេលសិក្សាក្នុងបណ្ណាល័យ ≠ ៦០នាទី។ ការធ្វើតេស្តបែបនេះជាប្រភេទ

a. . Two sided, two sample hypothesis testing

b. . Two sided, one sample hypothesis testing

c. . One sided, one sample hypothesis testing

d. . One sided, two sample hypothesis testing

31 / 60

នៅក្នុង hypothesis testing មានកំហុស(error) ពីរដែលអាចកើតឡើង។ តើឃ្លាខាងក្រោមនេះ ឃ្លាមួយណាដែលត្រឹមត្រូវទៅនឹងនិយមម័យរបស់ error.

a. . Type II error កើតឡើងនៅពេលដែលយើងមិនទាត់ចោល H0 នៅពេលដែលវាមិនពិត

b. . Type II error កើតឡើងនៅពេលដែលយើងទាត់ចោល H0 នៅពេលដែលវាមិនពិត

c. . Type II error កើតឡើងនៅពេលដែលយើងមិនទាត់ចោល H0 នៅពេលដែលវាពិត

d. . Type II error កើតឡើងនៅពេលដែលយើងទាត់ចោល H0 នៅពេលដែលវាពិត

32 / 60

ការសិក្សាទៅលើសំណាកនៃនិស្សិតឆ្នាំទី ២Aចំនួន ១១ នាក់បានរកឃើញថានិស្សិតបានចំណាយពេលសិក្សារយៈពេល ១០០នាទីក្នុង១ថ្ងៃហើយមាន standard deviation 20 នាទី។ គេចង់ធ្វើ hypothesis testing ថានិស្សិតឆ្នាំទី ២ បានចំណាយពេលរៀនរយៈពេល ២ម៉ោង ។ តើគេត្រូវសរសេរ Hypothesis យ៉ាងដូចម្តេច?

a. . H0: និស្សិតឆ្នាំទី២A បានចំណាយពេលសិក្សានៅផ្ទះ តិចជាង ២ ម៉ោង; Ha: និស្សិតថ្នាក់ទី ២A បានចំណាយពេលសិក្សានៅផ្ទះ ≠ ២ ម៉ោង

b. . H0: និស្សិតឆ្នាំទី២A បានចំណាយពេលសិក្សានៅផ្ទះ = ២ ម៉ោង; Ha: និស្សិតថ្នាក់ទី ២A បានចំណាយពេលសិក្សានៅផ្ទះ ≠ ២ ម៉ោង

c. . H0: និស្សិតឆ្នាំទី២A បានចំណាយពេលសិក្សានៅផ្ទះ ≠ ២ ម៉ោង; Ha: និស្សិតថ្នាក់ទី ២A បានចំណាយពេលសិក្សានៅផ្ទះ = ២ ម៉ោង

d. . H0: និស្សិតឆ្នាំទី២A បានចំណាយពេលសិក្សានៅផ្ទះ ច្រើនជាង ២ ម៉ោង; Ha: និស្សិតថ្នាក់ទី ២A បានចំណាយពេលសិក្សានៅផ្ទះ តិចជាង ២ ម៉ោង

33 / 60

ការសិក្សាទៅលើសំណាកនៃនិស្សិតឆ្នាំទី២B ចំនួន១៥នាក់ រកឃើញថានិស្សិតបានចំណាយពេលសិក្សានៅបណ្ណាល័យជាមធ្យម 50 នាទី ក្នុង១ ថ្ងៃ។ គេចង់ធ្វើ hypothesis testing ដោយមាន H0: រយះពេលសិក្សាក្នុងបណ្ណាល័យ≥ ៦០នាទី និង Ha: រយះពេលសិក្សាក្នុងបណ្ណាល័យ < ៦០នាទី។ ការធ្វើតេស្តបែបនេះជាប្រភេទ

a. . Two sided, two sample hypothesis testing

b. . One sided, two sample hypothesis testing

c. . One sided, one sample hypothesis testing

d. . Two sided, one sample hypothesis testing

34 / 60

ការសិក្សាទៅលើសំណាកនៃនិស្សិតឆ្នាំទី២A ចំនួន១៥នាក់ រកឃើញថានិស្សិតបានចំណាយពេលសិក្សានៅផ្ទះរយៈពេលមធ្យម ១២០នាទី ក្នុង១ ថ្ងៃ ហើយមាន standard deviation ៦០នាទី ហើយការសិក្សាទៅលើសំណាកនិស្សិតឆ្នាំទី ២Cចំនួន ១១នាក់បានរកឃើញថានិស្សិតបានចំណាយពេលសិក្សារយៈពេល ១០០នាទីក្នុង១ថ្ងៃហើយមាន standard
deviation 20 នាទី។គេចង់ប្រៀបធៀបថាតើនិស្សិតឆ្នាំទី ២A និង 2 B បានចំណាយពេលសិក្សាស្មើរគ្នាដែរឬទេ តើគេត្រូវធ្វើ hypothesis testing ប្រភេទណា?

a. . one sided hypothesis testing សំរាប់សំណាក ២ក្រុម

b. . two-sided hypothesis testing សំរាប់សំណាក១ក្រុម

c. . two-sided hypothesis testing សំរាប់សំណាក២ក្រុម

d. . one-sided hypothesis testing សំរាប់សំណាក១ក្រុម

35 / 60

អត្រាមរណៈភាពនៃទារក (Post Perinatal mortality Rate, Taux de mortalité Post Périnatale) គឺជាការគណនាអត្រាមរណៈភាព សំដៅទៅលើទារកដែលមានអាយុ:

a. ក្រោម ២៨ ថ្ងៃ

b. ក្រោម ១ ឆ្នាំ

c. ចាប់ពី៧ថ្ងៃ ដល់ ១ ឆ្នាំ

d. ក្រោម ៥ ឆ្នាំ

e. ក្រោម ៧ ថ្ងៃ

36 / 60

ចម្លើយទាំងអស់ខាងក្រោមនេះ សុទ្ធតែត្រឹមត្រូវ លើកលែងតែចម្លើយមួយដែលខុសអត្រាមរណៈភាពរួមគឺ៖

a. អត្រាមរណៈភាពតាមក្រុម ភេទ អាយុ

b. អត្រាមរណៈភាពទូទៅ

c. អត្រាមរណៈភាពសរុប

d. ផ្សេងពីនេះ

e. អត្រាមរណៈភាពគ្រប់មូលហេតុ

37 / 60

គេប្រើប្រាស់ប្រេវ៉ាឡង់ (Prevalent) ដើម្បីបង្ហាញ:

a. ជម្ងឺស្រួចស្រាវ (Maladies aigues)

b. ជម្ងឺរុំារៃ (Maladies chroniques)

c. ផ្សេងពីនេះ

d. ជម្ងឺដែលសល់ពីឆ្នាំចាស់

e. មានការរាតត្បាតនៃជម្ងឺ (Epidemic)

38 / 60

Period prevalent .Refers to:

a. New cases

b. A specific point in time

c. A given time interval

d. Number of Child birth.

e. Old cases

39 / 60

Properties and uses of the mode. The mode is / has:

a. A good descriptive measure, particularly for data that are skewed, because it is the central point of the distribution.

b. Excellent statistical properties and is commonly used in additional statistical manipulations and analyses.

c. A good descriptive measure, particularly for data analysis.

d. The difficult measure of central location to understand and explain.

e. The easiest measure of central location to understand and explain

40 / 60

To measure the average risk of death in the population at large, by calculation of:

a. Stillbirth rate (Late fetal death rate)

b. Crude death rate (CDR)

c. Perinatal mortality rate

d. Age- and sex specific death rate

e. Neonatal mortality rate

41 / 60

ប្រេវ៉ាឡង់ ត្រូវបានគណនាដូចតទៅ:

a. ជាចំនួនករណីជំងឺ នៅចំណុចជាក់លាក់មួយ ក្នុងប្រជាជនកំណត់មួយ

b. ចំនួនករណីជំងឺកើតថ្មី+ ជំងឺចាស់ X ១០០០ ចែកនឹង ប្រជាជនមធ្យម

c. ចំនួនករណីជំងឺកើតថ្មី X ១០០០ ចែកនឹង ប្រជាជនមធ្យម

d. ចំនួនករណីជំងឺកើតថ្មី ដែលកើតមានក្នុងកំឡុងពេលមួយ នៅលើប្រជាជនជាក់លាក់មួយ

e. ករណីជំងឺកើតថ្មី + និងជំងឺចាង់ក្នុងកំឡុងពេលមួយ នៅលើប្រជាជនជាក់លាក់មួយ

42 / 60

Age- and sex specific death rate is used to measure the:

a. Risk of fetal death occurring after 28 completed weeks of gestation

b. Risk of dying within 28 days of birth.

c. Risk of death among person in a specific age and sex group.

d. Risk of dying during infancy after the first-4 weeks of life.

e. Average risk of death in the population at large.

43 / 60

ឃ្លាខាងក្រោមនេះសុទ្ធតែត្រឹមត្រូវ លើកលែងតែ៖

a. ផ្សេងពីនេះ

b. ទិន្នន័យខ្លះមានម៉ូដតែមួយ ខ្លះទៀតមានម៉ូតច្រើន តែអាចមានទិន្នន័យដែលគ្មានម៉ូតដែរ

c. ម៉ូដមិនប្រែប្រួលទៅតាមតំលៃទាបពេក រឺ ខ្ពស់ពេក (Extreme Value)ឡើយ

d. ទិន្នន័យខ្លះមានម៉ូដតែមួយ ខ្លះទៀតមានម៉ូតច្រើន តែមិនអាចមានទិន្នន័យដែលគ្មានម៉ូតទេ

e. ម៉ូដ (Mode) ជាតំលៃដែលមានសង្វាក់កកើតខ្ពស់ជាងគេ (Highest frequency)

44 / 60

នៅកម្ពុជា អត្រាមរណៈភាពរបស់មាតាមាន ៦០ ភាគ ១០០០ កើតរស់មានន័យថា:

a. ក្នុងចំណោមស្ដ្រី ១០០០ នាក់ មានស្ដ្រី ៦០ នាក់ស្លាប់ក្នុង ១ ឆ្នាំ ដោយសារមានបញ្ហាឆ្លងទន្លេ

b. ក្នុងចំណោមទារក ១០០០ កើតរស់ មានស្ដ្រី ៦០ នាក់ស្លាប់ក្នុង ១ ឆ្នាំ ក្នុងពេលមានគ៌កនិង ជុំវិញការឆ្លងទន្លេ

c. ផ្សេងពីនេះ

d. ក្នុងចំណោមស្ដ្រី ១០០០ នាក់ មានស្ដ្រី ៦០ នាក់ស្លាប់ក្នុង ១ ឆ្នាំ ក្នុងពេលមានគក៌និងជុំវិញការឆ្លងទន្លេ

e. ក្នុងចំណោមទារក ១០០០ កើតរស់ មានស្ដ្រី ៦០ នាក់ស្លាប់ក្នុង ១ ឆ្នាំ ដោយសារមានបញ្ហាឆ្លងទន្លេ

45 / 60

Definition of mode: The mode is the value that:

a. Is the value that is closest to all the other values in a distribution

b. Is the beginning value of a set of data that has been put into rank order.

c. Occurs most often in a set of data

d. Is the middle value of a set of data that has been put into rank order.

e. Is the half-way point or the midpoint of a set of observations

46 / 60

This formula for calculated:

a. Maternal mortality rate (MMR)

b. Infant mortality rate

c. Neonatal mortality rate

d. Perinatal mortality rate

e. Post- neonatal mortality rate

47 / 60

ឃ្លាខាងក្រោមនេះសុទ្ធតែជាលក្ខណៈរបស់តំលៃកណ្ដាល (Median) លើកលែងតែ:

a. ផ្សេងពីនេះ

b. តំលៃកណ្ដាល (Median) ចែកទិន្នន័យជាពីរផ្នែកស្មើគ្នា

c. តំលៃកណ្ដាល (Median) មានតំលៃស្មើមធ្យមភាគ (Mean) និងម៉ូដក្នុងករណីដែលទិន្នន័យមានរបាយធម្មតា (normally distributed)

d. តំលៃកណ្ដាល (Median) មិនប្រែប្រួលទៅតាមតំលៃទាបពេក ឬ ខ្ពស់ពេកទេ

e. តំលៃកណ្ដាល (Median)អាចរកបានតែក្នុងករណីដែលចំនួនសង្កេត (number of observation) ជាចំនួនសេស(odd) តែប៉ុណ្ណោះ

48 / 60

The mean population in Rattanakiri province is 30000 populations (P) in year 2005.All cases of mortality is 200 cases. # Live births under 1 year = 1500 live births. Infant death under 1 year has 90 cases. # Live births of infant < 28 days of age = 200 Live births. Neonatal mortality = 45 cases and Maternal mortality = 50 deaths. Crude death rate is:

a. 1500 live births X1000/ 30000

b. 90 cases/1500 live births X1000

c. 45 cases/ 200 Live births X1000

d. 200 cases/30000 populations X1000

e. 50 deaths/1500 live births X1000

49 / 60

Qualitative variables are measured at the:

a. Nominal level

b. Proportional level

c. Numerical level

d. Rate level

e. Ratio level

50 / 60

To measure the risk of dying during infancy (e.g. the first year of life), by calculation of:

a. Case fatality rate (CFR)

b. Post- neonatal mortality rate.

c. Causes- specific death rate (CSDR)

d. Infant mortality rate.

e. Maternal mortality rate (MMR)

51 / 60

The population beginning of the year 2000 in Rattanakiri province has 60000 populations (P) and the end of the same year and same place have 70000 populations.All cases of mortality are 200 cases. # Live births = 12000 live births. The mean population in Rattanakiri in year 2000 has:

a. 60000P

b. (60000P+70000P)/2

c. 60000P-200 deaths

d. 70000P

e. 60000P +12000 Live births

52 / 60

តើអត្រាអ្វី ដែលគេគណនា ចំនួននៃការស្លាប់ក្នុង ១ ឆ្នាំ សំរាប់ប្រជាជន ១០០០ នាក់?

a. អត្រាមរណៈភាពនៃមាតា

b. អត្រាមរណៈភាពនៃកុមារ

c. អត្រាមរណៈភាព

d. សមាមាត្រស្លាប់នៃជំងឺ

e. ផ្សេងពីនេះ

53 / 60

The result of evaluation show that Good, Average, Poor Fully agree, agree, doubt, disagree .totally disagree is the type of:

a. Nominal scale

b. Ordinal scale

c. Interval scale

d. Ratio scale

e. Proportional scale.

54 / 60

This formula for calculated:

Total # death due to all causes in a defined area during a defined period X 1000

Mean population at risk in the same area during the same period

a. Perinatal mortality rate

b. Crude death rate (CDR)

c. Neonatal mortality rate

d. Age- and Sex specific death rate

e. Post- neonatal mortality rate

55 / 60

In an epidemic ( or outbreak ) of food poisoning, there were 10 cases of male and 40 cases of female among 120 female and 80 male exposed. Male attack rate is:

a. (50 X100) / 200

b. (10 X 100) /80

c. (40 X100) /120

d. (40 X100) /200

e. (10 X 100) /200

56 / 60

The numerator of calculation perinatal mortality rate is:

a. # perinatal deaths occurring in a specified area and period of time.

b. Total # deaths due to all causes in a defined area during a defined period.

c. # deaths of infant < 28 days of age in an area during a given period

d. Total # deaths occurring in a specific age and sex group of the population of a defined area during a defined period.

e. # deaths among infants aged 4 weeks- 1 year occurring in an area during a given period.

57 / 60

Bias: The true biologic variation in clinical measurement is:

a. The sum many unknown factors, each of which contributes a small random effect.

b. Measurement to exceed the true value as they are to be positive.

c. Each of which contributes a small random effect.

d. The sum many unknown factors ,

e. Random effects based on the lows of probability are as likely to be negative.

58 / 60

Variation in clinical measurement including:

a. Reliable

b. Imprecision

c. Inaccuracy

d. Efficiency

e. Bias

59 / 60

Step 1. Identify the smallest (minimum) observation and the largest (maximum) observation. Step 2. Add the minimum plus the maximum, then divide by two: is the formula for calculate the:

a. Mode

b. Ratio

c. Median

d. Mid range

e. Mean

60 / 60

នៅក្នុងខេត្តប៉ៃលិនមានប្រជាជន៦០០០០ នាក់ នៅដើមឆ្នាំ ២០១៤។ ទារកកើតរស់ក្នុងឆ្នាំនោះមាន ៤% កុមារស្លាប់អាយុក្រោម ១ ឆ្នាំ មាន ២៤០ នាក់។ អត្រាមរណៈភាពនៃកុមារ (Taux de mortalité Infantile, Infant Mortality Rate) មាន:

a. ផ្សេងពីនេះ

b. ១០/១០០ កើតរស់

c. ១/១០០០ កើតរស់

d. ១០/១០០០០ កើតរស់

e. ១/១០០ កើតរស់

Your score is

The average score is 93%

Any comments?

Any problems/errors or mistakes found while testing, please let us know for modification!

និស្សិតអាចប្រាប់មកកាន់ពួកយើងបានដើម្បីកែកំហុស ឬអំពីបញ្ហាដោយអចេតនាណាមួយដែលកើតមានកំឡុងពេលធ្វើតេស្ត