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SantΓ© Publique Preparation (Dr. Tol Bunkea)

 

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1)

What is the statement of specificity of a diagnostic test:

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2)

If a specificity of a screening test was 89%, it means that:

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3)

A positive predictive value depend on:

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4)

αžαžΎαž’αŸ’αžœαžΈαžαŸ’αž›αŸ‡αž‡αžΆαž•αŸ’αž“αŸ‚αž€αžšαž”αžŸαŸ‹ Descriptive statistics?

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5)

The negative predictive value of a test decreases:

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6)

What is the correct answer about a point estimate statement:

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7)

What is the correct answer about a point estimatestatement:

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8)

Which below statement is not correct:

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9)

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:

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10)

The director of the blood bank wants to know whether blood donors who test positive should be informed of their positive HIV status on the basis of this test. What do you need to calculate in order to help you advise the director?

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11)

What is the correct statement of negative predictive value (NPV) of a screening test:

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12)

The width of a confidence interval is influenced by:

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13)

Chose the incorrect statement describe the diagnostic test:

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14)

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

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15)

In statistics, a sample mean:

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16)

What is the probability of getting an odd number when you roll a dice?

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17)

When the new drug was clinically tested, 117 patients reported headaches and 617 did not. Based on this sample what is the probability that a new drug user will experience a headache:

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18)

If an event is impossible it has a probability of:

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19)

A negative predictive value of a test decreases as:

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20)

Statistic is a numerical quantity, which is calculated from:

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21)

The standard error of the mean of a sample is:

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22)

Which answer below is correct about the confidence interval:

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23)

Since the population size is always larger than the sample size, then the sample statistic

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24)

In descriptive statistics, we study:

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25)

You asked five of your classmates about their height. On the basis of this information, you stated that the average height of all students in your university or college is 1.67 meters. This is an example of:

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26)

If an event has a probability of 0.8 it is:

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27)

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

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28)

What is the correct answer about a point estimatestatement:

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29)

The Negative Predictive Value was 98% means that:

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30)

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?

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31)

In inferential statistics, we study

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32)

If we want higher chance of error we could calculate (chose the correct answer):

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33)

The primary reason for selecting a sample from a population is:

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34)

The standard error of the mean of a sample is:

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35)

The width of a confidence interval will decrease when which of the following changes occur:

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36)

The upper bound and lower bound of confidence interval are calculated using (chose the correct answer):

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37)

What is the correct statement of screening test:

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38)

A group of 100 people are asked to state their favourite colour. 60 say blue. This experiment says that the probability of someone choosing blue is:

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39)

Which statement is not true about confidence intervals?

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40)

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

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41)

If a sensitivity of a screening test was 80%, it means that:

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42)

A parameter is a measure which is computed from

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43)

In statistics, a population consists of

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44)

Population census is conducted through

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45)

Reliability of a test means that:

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46)

If we want less chance of error we could calculate (chose the correct answer):

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47)

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

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48)

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

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49)

Which below statement is not correct:

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50)

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

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51)

What is the correct statement of diagnostic test:

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52)

When data are collected in a statistical study for only a portion or subset of all elements of interest we are using

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53)

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

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54)

Which answer below is not correct about the confidence interval:

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55)

Which of the statements is true if a particular event has a probability of 10%?

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56)

Which below statement is not correct:

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57)

The meaning of reliability of a test is:

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58)

A positive predictive value of a test increases as:

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59)

On the statements below which are valid statements of probability:

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60)

The Positive Predictive Value was 40% means that:

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61)

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

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62)

What is the correct answer about a confidence interval statement:

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63)

We measure the sample using statistics in order to:

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64)

On the statements below which are validstatements of probability:

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65)

A screening test result for cervical cancer show that PPV= 67%. It means that:

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66)

Which of the following statements is true about the standard error of a proportion?

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67)

The height of a student is 1.62 meters. This is an example of:

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68)

Positive Predictive Value primarily depends on (chose the incorrect answer):

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69)

In descriptive statistics, we study:

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70)

If the variance of a data set is correctly computed with the formula using n – 1 in the denominator, which of the following is true?

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71)

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

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72)

On the statements below what is valid statements of probability:

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73)

αžαžΎαž’αŸ’αžœαžΈαžαŸ’αž›αŸ‡αž‡αžΆαž•αŸ’αž“αŸ‚αž€αžšαž”αžŸαŸ‹ Descriptive statistics?

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74)

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

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75)

ΞΌ is an example of a

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76)

On the statements below which are validstatements of probability:

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77)

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

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78)

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:

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79)

The Positive Predictive Value of a test increases:

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80)

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

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81)

Below is the common screening test except one:

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82)

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

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83)

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

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84)

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

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85)

If a positive predictive value was 44%, it means that:

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86)

What is the wrong interpretation of 95% confidence interval:

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87)

The width of a confidence interval is influenced by:

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88)

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

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89)

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

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90) Confidence intervals are calculated for proportions, rates, risk ratios, odds ratios, and other epidemiologic measures:

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91)

A positive predictive value depend on:

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92)

If the diagnostic (confirmatory) test is expensive or invasive the best diagnostic test is:

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93)

Which of these is most likely to happen?

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94)

What is the statement of sensitivity of a diagnostic test:

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95)

Which below statement is not correct:

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96)

Which branch of statistics deals with the techniques that are used to organize, and summarize and simplify data:

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97)

Which below statement is not correct:

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98)

If an event has a probability of 0.1 it is:

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99)

On the statements below what is valid statements of probability:

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100)

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

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101)

The Positive Predictive Value depends on:

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102)

αžŸαŸ’αžαž·αžαž·αžœαž·αž‘αŸ’αž™αžΆ (statistics) αž˜αžΆαž“αž…αŸ‚αž€αž…αŸαž‰αž‡αžΆ

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103)

A screening test result for cervical cancer show that NPV= 99%. It means that:

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104)

A numerical value used as a summary measure for a sample, such as sample mean, is known as a

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