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SantΓ© Publique Preparation (Dr. Tol Bunkea)

 

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1)

What is the correct answer about a confidence interval statement:

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2)

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

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3)

The Negative Predictive Value was 98% means that:

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4)

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

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5)

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

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6)

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

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7)

What is the correct answer about a point estimatestatement:

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8)

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

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9)

What is the statement of specificity of a diagnostic test:

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10)

A positive predictive value depend on:

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11)

A negative predictive value of a test decreases as:

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12)

What is the correct statement of screening test:

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13)

On the statements below what is valid statements of probability:

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14)

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

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15)

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

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16)

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

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17)

What is the correct answer about a point estimate statement:

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18)

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

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19)

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

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20)

Which below statement is not correct:

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21)

Which below statement is not correct:

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22)

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

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23)

In descriptive statistics, we study:

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24)

The Positive Predictive Value was 40% means that:

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25)

Which below statement is not correct:

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26)

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

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27)

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

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28)

Which below statement is not correct:

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29)

Which statement is not true about confidence intervals?

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30)

Statistic is a numerical quantity, which is calculated from:

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31)

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

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32)

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

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33)

A positive predictive value of a test increases as:

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34)

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

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35)

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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36)

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

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37)

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

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38)

In descriptive statistics, we study:

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39)

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

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40)

A positive predictive value depend on:

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41)

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

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42)

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

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43)

If an event is impossible it has a probability of:

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44)

On the statements below which are valid statements of probability:

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45)

If an event has a probability of 0.1 it is:

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46)

On the statements below what is valid statements of probability:

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47)

What is the wrong interpretation of 95% confidence interval:

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48)

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

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49)

Chose the incorrect statement describe the diagnostic test:

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50)

In statistics, a sample mean:

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51)

In statistics, a population consists of

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52)

What is the correct answer about a point estimatestatement:

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53)

What is the correct statement of diagnostic test:

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54)

The Positive Predictive Value of a test increases:

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

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56)

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

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57)

On the statements below which are validstatements of probability:

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58)

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

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59)

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

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60)

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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61)

The standard error of the mean of a sample is:

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62)

The width of a confidence interval is influenced by:

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63)

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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64)

Which answer below is correct about the confidence interval:

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65)

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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66)

Below is the common screening test except one:

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67)

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

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68)

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

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69)

The standard error of the mean of a sample is:

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70)

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

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71)

We measure the sample using statistics in order to:

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72)

On the statements below which are validstatements of probability:

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73)

A parameter is a measure which is computed from

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74)

Reliability of a test means that:

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75)

The negative predictive value of a test decreases:

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76)

What is the statement of sensitivity of a diagnostic test:

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77)

The Positive Predictive Value depends on:

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78)

ΞΌ is an example of a

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79)

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

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80)

Which of these is most likely to happen?

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81)

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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82)

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

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83)

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

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84)

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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85)

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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86)

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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87)

Which answer below is not correct about the confidence interval:

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88)

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

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89)

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

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90)

The meaning of reliability of a test is:

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91)

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

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92)

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

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93)

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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94)

In inferential statistics, we study

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95)

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

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96)

If an event has a probability of 0.8 it is:

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97)

Which below statement is not correct:

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98)

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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99)

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

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100)

Population census is conducted through

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101)

The width of a confidence interval is influenced by:

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102)

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

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103)

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

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104)

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

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