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SantΓ© Publique Preparation (Dr. Tol Bunkea)

 

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1)

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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2)

Chose the incorrect statement describe the diagnostic test:

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3)

The width of a confidence interval is influenced by:

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4)

What is the correct answer about a point estimatestatement:

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5)

The standard error of the mean of a sample is:

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6)

In descriptive statistics, we study:

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7)

What is the correct statement of screening test:

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8)

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

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9)

Population census is conducted through

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10)

A negative predictive value of a test decreases as:

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11)

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

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12)

What is the wrong interpretation of 95% confidence interval:

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13)

The standard error of the mean of a sample is:

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14)

The Positive Predictive Value of a test increases:

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15)

On the statements below which are validstatements of probability:

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16)

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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17)

Reliability of a test means that:

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18)

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

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19)

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

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20)

Which answer below is correct about the confidence interval:

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21)

In statistics, a population consists of

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22)

A positive predictive value of a test increases as:

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23)

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

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24)

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

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25)

Which answer below is not correct about the confidence interval:

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26)

What is the statement of specificity of a diagnostic test:

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27)

Which statement is not true about confidence intervals?

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28)

If an event has a probability of 0.8 it is:

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29)

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

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30)

If an event is impossible it has a probability of:

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31)

What is the correct answer about a point estimate statement:

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32)

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

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33)

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

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34)

On the statements below what is valid statements of probability:

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35)

In statistics, a sample mean:

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36)

What is the correct answer about a point estimatestatement:

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37)

What is the statement of sensitivity of a diagnostic test:

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38)

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

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39)

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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40)

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

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41)

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

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42)

Which below statement is not correct:

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43)

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

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44)

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

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45)

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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46)

The width of a confidence interval is influenced by:

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47)

Which below statement is not correct:

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48)

Which below statement is not correct:

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49)

On the statements below which are validstatements of probability:

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50)

In inferential statistics, we study

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51)

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

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52)

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

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53)

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

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54)

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

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55)

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

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56)

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

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57)

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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58)

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

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

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60)

If an event has a probability of 0.1 it is:

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61)

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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62)

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

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63)

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

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64)

The Positive Predictive Value was 40% means that:

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65)

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

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66)

A positive predictive value depend on:

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67)

What is the correct answer about a confidence interval statement:

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68)

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

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69)

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

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70)

On the statements below which are valid statements of probability:

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71)

A positive predictive value depend on:

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72)

Which of these is most likely to happen?

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73)

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

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74)

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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75)

What is the correct statement of diagnostic test:

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76)

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

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77)

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

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78)

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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79)

Which below statement is not correct:

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80)

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

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81)

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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82)

Statistic is a numerical quantity, which is calculated from:

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83)

On the statements below what is valid statements of probability:

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84)

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

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85)

Below is the common screening test except one:

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86)

The Negative Predictive Value was 98% means that:

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87)

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

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88)

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

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89)

The negative predictive value of a test decreases:

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90)

Which below statement is not correct:

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91)

In descriptive statistics, we study:

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92)

We measure the sample using statistics in order to:

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93)

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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94)

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

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95)

The Positive Predictive Value depends on:

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96)

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

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97)

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

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98)

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

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99)

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

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100)

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

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101)

The meaning of reliability of a test is:

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102)

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

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103)

A parameter is a measure which is computed from

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104)

ΞΌ is an example of a

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