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SantΓ© Publique Preparation (Dr. Tol Bunkea)

 

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1)

Reliability of a test means that:

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2)

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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3)

In descriptive statistics, we study:

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4)

Which below statement is not correct:

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5)

We measure the sample using statistics in order to:

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6)

The meaning of reliability of a test is:

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7)

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

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8)

What is the correct answer about a point estimatestatement:

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9)

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

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10)

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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11)

Below is the common screening test except one:

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12)

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

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13)

Which answer below is not correct about the confidence interval:

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14)

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

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15)

The standard error of the mean of a sample is:

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16)

Which of these is most likely to happen?

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17)

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

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18)

A positive predictive value depend on:

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19)

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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20)

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

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21)

What is the correct answer about a point estimate statement:

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22)

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

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23)

In statistics, a population consists of

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24)

Which answer below is correct about the confidence interval:

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25)

On the statements below what is valid statements of probability:

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26)

Which below statement is not correct:

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27)

On the statements below what is valid statements of probability:

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28)

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

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29)

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

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30)

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

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31)

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

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32)

Statistic is a numerical quantity, which is calculated from:

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33)

In statistics, a sample mean:

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34)

What is the correct answer about a confidence interval statement:

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35)

If an event is impossible it has a probability of:

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36)

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

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37)

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

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

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39)

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

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40)

If an event has a probability of 0.8 it is:

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41)

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

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42)

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

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43)

A parameter is a measure which is computed from

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44)

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

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45)

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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46)

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

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47)

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

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48)

Chose the incorrect statement describe the diagnostic test:

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49)

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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50)

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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51)

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

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52)

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

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53)

The Negative Predictive Value was 98% means that:

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54)

ΞΌ is an example of a

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55)

The width of a confidence interval is influenced by:

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56)

The Positive Predictive Value of a test increases:

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57)

A negative predictive value of a test decreases as:

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58)

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

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59)

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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60)

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

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61)

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

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62)

What is the correct statement of diagnostic test:

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63)

On the statements below which are validstatements of probability:

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64)

The Positive Predictive Value was 40% means that:

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65)

The Positive Predictive Value depends on:

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66)

A positive predictive value depend on:

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67)

On the statements below which are valid statements of probability:

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68)

Which statement is not true about confidence intervals?

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69)

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

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70)

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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71)

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

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72)

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

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73)

In descriptive statistics, we study:

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74)

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

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75)

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

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76)

On the statements below which are validstatements of probability:

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77)

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

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78)

What is the correct answer about a point estimatestatement:

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79)

In inferential statistics, we study

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80)

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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81)

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

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82)

The width of a confidence interval is influenced by:

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83)

Which below statement is not correct:

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84)

A positive predictive value of a test increases as:

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85)

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

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86)

If an event has a probability of 0.1 it is:

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87)

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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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 positive predictive value (PPV) of a screening test:

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90)

Which below statement is not correct:

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91)

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

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92)

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

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93)

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

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94)

Which below statement is not correct:

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95)

Population census is conducted through

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96)

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

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97)

What is the statement of sensitivity of a diagnostic test:

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98)

The standard error of the mean of a sample is:

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99)

What is the wrong interpretation of 95% confidence interval:

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100)

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

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101)

What is the correct statement of screening test:

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102)

The negative predictive value of a test decreases:

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103)

What is the statement of specificity of a diagnostic test:

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104)

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

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