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SantΓ© Publique Preparation (Dr. Tol Bunkea)

 

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1)

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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2)

What is the correct answer about a point estimatestatement:

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3)

Below is the common screening test except one:

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4)

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

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5)

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

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6)

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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7)

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

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8)

What is the correct answer about a confidence interval statement:

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9)

What is the correct statement of screening test:

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10)

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

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11)

The width of a confidence interval is influenced by:

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12)

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

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13)

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

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14)

Chose the incorrect statement describe the diagnostic test:

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15)

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

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16)

If an event has a probability of 0.1 it is:

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17)

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

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18)

Which below statement is not correct:

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19)

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

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20)

Which answer below is not correct about the confidence interval:

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21)

A negative predictive value of a test decreases as:

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22)

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

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23)

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

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24)

If an event has a probability of 0.8 it is:

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25)

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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26)

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

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27)

A positive predictive value depend on:

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28)

What is the correct statement of diagnostic test:

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29)

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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30)

Which below statement is not correct:

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31)

The width of a confidence interval is influenced by:

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32)

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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33)

In statistics, a sample mean:

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34)

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

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35)

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

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36)

In descriptive statistics, we study:

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37)

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

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38)

A positive predictive value of a test increases as:

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39)

On the statements below which are validstatements of probability:

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40)

Population census is conducted through

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41)

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

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42)

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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43)

If an event is impossible it has a probability of:

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44)

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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45)

A positive predictive value depend on:

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46)

The meaning of reliability of a test is:

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47)

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

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48)

Which below statement is not correct:

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49)

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

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50)

Which statement is not true about confidence intervals?

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51)

On the statements below which are validstatements of probability:

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52)

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

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53)

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

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54)

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

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55)

Statistic is a numerical quantity, which is calculated from:

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56)

ΞΌ is an example of a

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57)

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

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58)

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

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59)

What is the correct answer about a point estimatestatement:

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60)

The Positive Predictive Value depends on:

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61)

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

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62)

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

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63)

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

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64)

The standard error of the mean of a sample is:

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65)

On the statements below what is valid statements of probability:

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66)

What is the statement of sensitivity of a diagnostic test:

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67)

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

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68)

What is the wrong interpretation of 95% confidence interval:

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69)

In inferential statistics, we study

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70)

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

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71)

In statistics, a population consists of

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72)

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

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73)

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

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74)

The negative predictive value of a test decreases:

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75)

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

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76)

What is the statement of specificity of a diagnostic test:

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77)

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

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

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79)

The Positive Predictive Value was 40% means that:

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80)

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

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81)

The Positive Predictive Value of a test increases:

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82)

Which answer below is correct about the confidence interval:

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83)

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

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84)

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

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85)

Which of these is most likely to happen?

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86)

On the statements below what is valid statements of probability:

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87)

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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88)

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

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89)

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

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90)

The standard error of the mean of a sample is:

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91)

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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92)

Reliability of a test means that:

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93)

On the statements below which are valid statements of probability:

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94)

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

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95)

Which below statement is not correct:

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96)

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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97)

Which below statement is not correct:

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98)

A parameter is a measure which is computed from

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99)

We measure the sample using statistics in order to:

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100)

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

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101)

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

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102)

In descriptive statistics, we study:

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103)

What is the correct answer about a point estimate statement:

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104)

The Negative Predictive Value was 98% means that:

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