previous year qustions ( 1st exam)

7/29/2019 Previous Year Qustions ( 1st Exam)

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Form (1)

Chose the appropriate answer (each question has 1.5 points)1 - 4 A random sample JUST students were selected to determine the smoking habit compared to

nonsmoking habit. The following table shows the sample subjects cross-classifiedaccording to smoking status and specialty.

Specialty

Smoking Status

TotalSmoking NotSmoking

Medical Sciences 20 40 60Engineering 24 72 96Agriculture 12 38 50Humanities 28 66 94Total 80 220 300

If a student is selected at random,1. The probability that he/she is agriculture AND a smoking student is:

a. 0. 167 b. 0. 267 c. 0. 625 d. 0. 040 e. 0.90

2. The probability that he/she is an agriculture student OR not smoking is:a. 0. 167 b. 0. 267 c. 0. 773 d. 0. 040 e. 0.90

3. The probability that he/she is NOT an engineering student is:a. 0. 320 b. 0. 680 c. 0. 733 d. 0. 040 e. 0.90

4. The probability that he/she is a medical science student IF he is selected from smoking studentsis:a. 0. 25 b. 0. 20 c. 0. 18 d. 0. 05 e. 0.15

5 - 7. The following table shows the results of a screening test evaluation in which a randomsample of 500 subjects with the disease and an independent random sample of 500 subjectswithout the disease participated:

DiseaseTest Results

Positive Negative

Present 466 34Absent 15 485

Based on these data,5. the sensitivity of the test is:

a. 0.476 b. 0. 0.970 c. 0.932 d. 0. 940 e. 0.886. the specificity of the test is:

a. 0.476 b. 0. 0.970 c. 0.932 d. 0. 940 e. 0.887. the total number of false negatives of the test is

a. 34 b. 15 c. 466 d. 485 e. 519

8 12 The following table showes the frequency distribution of ages (in years) of patients admittedto Princess Basma Hospital During Eid Al Fitr Holiday period:

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Class Interval Frequency10 - 19 1420 - 29 4630 - 39 5340 - 49 5650 - 59 2260 - 69 9

From these data,8. The relative frequency of class interval 40 49 is:

a. 56 b. 169 c. 0.280 d. 0..8459. The cumulative relative frequency of class interval 40 49 is

a. 56 b. 169 c. 0.280 d. 0..84510. The cumulative frequency of class interval 40 49 is

a. 87 b. 169 c. 0.280 d. 0..84511. The number of patients 40 years old is:

a. 87 b. 113 c. 0.565 d. 0..84512. The percentage of patients 40 years old is:

a. 0. 87 b. 0. 435 c. 0.565 d. 0..845

13 15 The following are weights (Kg) of a sample of nursing students in Biostatistics class:83.9, 99.0, 63.8, 71.3, 65.3, 79.6, 70.3, 69.2, 56.4, 66.2, 88.7, 59.7, 64.6, 78.813. The median of the weight of the sample of the nursing students is:

a. 72.63 b. 69.75 c. 142.56 d. 11.94 e. 16.4414. The variance of the weight of the sample of the nursing students is:

a. 72.63 b. 69.75 c. 142.56 d. 11.94 e. 16.4415. The coefficient of variation of the weight of the sample of the nursing students is:

a. 72.63 b. 69.75 c. 142.56 d. 11.94 e. 16.4416 17. If (60%) of Jordanian adult males smoke. Consider a simple random sample of 8 male

adults;16. The probability that the number of smokers in that sample would be exactly 4 is:

a. 0.2322 b. 0.1737 c. 0.5941 d. 0.4059 e. 0.333717. The probability that the number of smokers in that sample would be more than 4 is:

a. 0.2322 b. 0.1737 c. 0.5941 d. 0.4059 e. 0.333718 20. If 30% of the Jordanian dults are over overweight, If we select a random sample of 10

Jordanian adults,18. the probability that the number of overweight adults will be exactly 5 is:

a. 0.9527 b. 0.8497 c. 0.0473 d. 0.103 e. 0.150319. the probability that the number of overweight adults will be less than5 is:

a. 0.9527 b. 0.8497 c. 0.0473 d. 0.103 e. 0.150320. the probability that the number of overweight adults will be more than5 is:

a. 0.9527 b. 0.8497 c. 0.0473 d. 0.103 e. 0.1503

Form (2)

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1 - 5 A study to investigate the hypothesis that HIV-infected women who are also infected withHPV are more likely to have cervical problems than are women with only one or neithervirus. The data reported by investigators are in the following table.

HPVStage of HIV infection

Severe Moderate Mild TotalPositive 23 4 10 37

Negative 10 14 35 59

Total 33 18 45 96

Based on these data:1. The probability that a woman selected at random will be HPV positive is:

a. 0.622 b. 0.385 c. 0.615 d. 0.344 e.1.592. The probability that a woman selected at random will be HPV negative is:

a. 0.622 b. 0.385 c. 0.615 d. 0.344 e.1.593. The probability that a woman selected at random from those women having Moderate HIV

infection will be HPV negative is:a. 0.188 b. 0.237 c. 0.469 d. 0.778 e.1.29

4. The probability that a woman selected at random from those women infected with HPV will

have mild infection with HIV is:a. 0.822 b. 0.270 c. 0.306 d. 0.778 e.0.222

5. The probability that a woman selected at random will have severe infection with HIV is:a. 0.344 b. 0.385 c. 0.615 d. 0.469 e.1.59

6 - 11. The following table shows the result of a screening test evaluation in which a randomsample of 650 subjects with the disease and an independent random sample of 1200subjects without the disease participated:

Test results

Disease

Present Absent

Positive 500 50

Negative 150 1150

Based on these data:6. the sensitivity of the test is

a. 0.7692 b. 0.7538 c. 0.9417 d. 0.25 e. 0.87507. the specificity of the test is

a. 0.5738 b. 0.9583 c. 0.9417 d. 0.8760 e. 0.87508. The relative predictive value positive of the test is

a. 0.9091 b. 0.7538 c. 0.9417 d. 0.25 e. 0.87509. The relative predictive value negative of the test is

a. 0.5738 b. 0.7538 c. 0.9417 d. 0.8846 e. 0.8750

10. The total number of false negatives of the test isa. 450 b. 150 c. 50 d. 1150 e. 650

11. The total number of false positives of the test isa. 450 b. 150 c. 50 d. 1150 e. 650

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12 - 13. The blood pressures of 10 men were measured before and after Smoking. The changeswere: +15, -5, +7, -9, +2, +3, -4, -5, -3, +9

12. The range of change is:a. 20 b. 15 c. 10 d. 5 e. 1

13. The mean change:a. 20 b. 15 c. 10 d. 5 e. 1

14-16.Students in a class are classified according to age and sex as follows:Male Female

Under 21 years 4 221 years or older 11 3

Assume that two students are selected at random from this class.14. The probability that BOTH students are MALES is:

a. 0.45 b.0.55 c.0.65 d.0.75 e.1.015. The probability that BOTH students are UNDER 21 years old is:

a. 0.21 b.0.80 c. 0.08 d. 0.48 e. 0.4916. The probability that BOTH students are Of THE SAME SEX is:

a. 0. 05 b. 0. 45 c. 0. 55 d. 0. 60 e. 0. 4017 - 19 The frequency distribution of ages of 178subjects is summarized in the following table:

Class Interval Frequency0 9

10 1920 2930 3940 4950 5960 69

914564233168

Total 178Based on these data:

17. the relative frequency of those 20 29 years old isa. 0.0506 b. 0.0787 c. 0.3146 d. 0.2360 e. 0.185418. The commulative relative frequency of those less than 30 years old isa. 0.1292 b. 0.3933 c. 0.6798 d. 0.3202 e. 0.443819. The commulative frequency of those less than 30 years old isa. 9 b. 14 c.70 d. 79 e. 121

20. One of the following DOES NOT represent a commulative frequency polygon

Form (3)

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1 - 2. The blood pressures of 10 men were measured before and after Smoking. The changes were:+15, -5, +7, -9, +2, +3, -4, -5, -3, +9

1. The range of change is:b. 20 b. 15 c. 10 d. 5 e. 1

2. The mean change:b. 20 b. 15 c. 10 d. 5 e. 1

3-5.Students in a class are classified according to age and sex as follows:Male Female

Under 21 years 4 221 years or older 11 3

Assume that two students are selected at random from this class.3. The probability that BOTH students are MALES is:

b. 0.45 b.0.55 c.0.65 d.0.75 e.1.04. The probability that BOTH students are UNDER 21 years old is:

a. 0.21 b.0.80 c. 0.08 d. 0.48 e. 0.495. The probability that BOTH students are Of THE SAME SEX is:

b. 0. 05 b. 0. 45 c. 0. 55 d. 0. 60 e. 0. 406 8 The frequency distribution of ages of 178 subjects is summarized in the

following table:

Class Interval Frequency0 9

10 1920 2930 3940 4950 5960 69

914564233168

Total 178

Based on these data:6. The relative frequency of those 20 29 years old is

a. 0.0506 b. 0.0787 c. 0.3146 d. 0.2360 e. 0.18547. The commulative relative frequency of those less than 30 years old is

a. 0.1292 b. 0.3933 c. 0.6798 d. 0.3202 e. 0.44388. The commulative frequency of those less than 30 years old isa. 9 b. 14 c.70 d. 79 e. 121

9 - 13 A study to investigate the hypothesis that HIV-infected women who are also infected withHPV are more likely to have cervical problems than are women with only one or neithervirus. The data reported by investigators are in the following table.

HPVStage of HIV infection

Severe Moderate Mild TotalPositive 23 4 10 37

Negative 10 14 35 59Total 33 18 45 96

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Based on these data:9. The probability that a woman selected at random will be HPV positive is:a. 0.622 b. 0.385 c. 0.615 d. 0.344 e.1.59

10. The probability that a woman selected at random will be HPV negative is:a. 0.622 b. 0.385 c. 0.615 d. 0.344 e.1.5911. The probability that a woman selected at random from those women having ModerateHIV infection will be HPV negative is:a. 0.188 b. 0.237 c. 0.469 d. 0.778 e.1.29

12. The probability that a woman selected at random from those women infected with HPVwill have mild infection with HIV is:a. 0.822 b. 0.270 c. 0.306 d. 0.778 e.0.22213. The probability that a woman selected at random will have severe infection with HIV is:a. 0.344 b. 0.385 c. 0.615 d. 0.469 e.1.59

14-19. The following table shows the result of a screening test evaluation in which a randomsample of 650 subjects with the disease and an independent random sample of 1200subjects without the disease participated:

Test results

Disease

Present Absent

Positive 500 50Negative 150 1150

Based on these data:14. the sensitivity of the test isa. 0.7692 b. 0.7538 c. 0.9417 d. 0.25 e. 0.875015. the specificity of the test isa. 0.5738 b. 0.9583 c. 0.9417 d. 0.8760 e. 0.875016. The relative predictive value positive of the test isa. 0.9091 b. 0.7538 c. 0.9417 d. 0.25 e. 0.875017. The relative predictive value negative of the test isa. 0.5738 b. 0.7538 c. 0.9417 d. 0.8846 e. 0.8750

18. The total number of false negatives of the test isa. 450 b. 150 c. 50 d. 1150 e. 65019. The total number of false positives of the test isa. 450 b. 150 c. 50 d. 1150 e. 650

20. One of the following DOES NOT represent a commulative frequency polygon

Form (4)

Chose the appropriate answer (each question has 1 point)

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1. All of the followings are measures of central tendency EXCEPTa. Variance * b. mean c. mode d. median e. a or b

2. Grouping individuals by marital status, blood group or by sex are examples of this scale:a. Ratio Scale b. Nominal Scale* c. Ordinal Scaled. Interval Scale e. Marginal Scale

3. Classifying individuals according to their level of intelligence (above average, average or below

average) is an example of this scale:a. Ratio Scale b. Nominal Scale c. Ordinal Scale*d. Interval Scale e. Marginal Scale

4. The number of patients admitted daily in Princess Basma Hospital is an example of:a. Discrete random variable* b. Discrete variablec. Continuous random variable d. Quantitative variable e. Qualitative variable.

5 - 7. The blood pressures of 10 men were measured before and after Smoking. The changes were:

+10, -5, +7, -4, +2, +3, -4, -5, -3, +9.

5. The range of change is:a. 19 b. 15* c. 12 d. 5 e. 1

6. The mean of change is:a. 19 b. 15 c. 12 d. 5 e. 1*

7. The standard deviation of change is:a. 6.17* b. 38.04 c. 12 d. 5 e. 1

8 - 9. Students in a class are classified according to age and sex as follows:. Male Female

Under 20 years 5 220 years or older 9 4Assume that two students are selected at random from this class.

8. The probability that BOTH students are males is:a. 0.56 b. 0.48 * c. 0.56 d. 0.11 e. 1.2

9. The probability that BOTH students are under 20 years old isa. 0.56 b. 0.55 c. 0.08 d. 0.11* e. 1.2

10 - 12 One hundred women were asked to specify the minimum number of pregnancies theywould like to have when they got married, the following table shows the 100 responses

cross-tabulated by educational level of the respondent

Minimum #of pregnancies

Educational Level of womenTotal

High School(X)

College(Y)

GraduateSchool (Z)

One (A) 15 8 7 30

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Two (B) 3 7 20 30Three (C) 5 5 15 25Four (D) 10 3 2 15Total 33 23 44 100

:10. If a woman is selected at random, the probability that she is having college degree (Y) and

would like to have two (B) numbers of pregnancies is:a. 0.23 b. 0.30 c. 0.07* d. 0.77 e. 0. 05

11. If a woman is selected at random, the probability that she is having Graduate school degree (Z)OR would like to have two numbers of pregnancies (B) is:a. 0.74 b. 0.0.64 c. 0.54* d. 0.44 e. 0. 34

12. If a woman is selected at random, the probability that she is NOT having Graduate schooldegree (Z) is:a. 0.76 b. 0.0.66 c. 0.56* d. 0.44 e. 0. 36

13 - 16. The following table shows the result of a screening test evaluation in which a randomsample of 700 subjects with the disease and an independent random sample of 1400

subjects without the disease participated:

Test results

Disease

Present Absent

Positive 540 170Negative 160 1230

Based on these data,13. the sensitivity of the test is

a. 0.57 b. 0.77* c. 0.94 d. 0.85 e. 0.88

14. the specificity of the test isa. 0.57 b. 0.77 c. 0.94 d. 0.85 e. 0.88*

15. the total number of false negatives of the test isa. 540 b. 160* c. 170 d. 1230 e. 710

16. the total number of false positives of the test isa. 540 b. 160 c. 170* d. 1230 e. 710

17 18. If (30%) of Jordanian adult males smoke. Consider a simple random sample of 8 adult

males.,

17. The probability that the number of smokers in that sample would be exactly 3 isa.0.8059 b. 0.1941 c. 0.5518 d. 0.2541* e. 0.3337

18. The probability that the number of smokers in that sample would be more than 4 is:

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a.0.0580* b. 0.0113 c. 0.1137 d. 0.2541 e. 0.3337

19 20. If 80% of the babies born in KAUH are delivered normally. Consider a normal sample of5 babies.

19. The probability that the number of normally delivered babies in this sample is exactly 3 is:.0.2048* b.0.7373 c.0.9421 d.0.0579 e. 0.2627

20. The probability that the number of normally delivered babies in this sample is less than 3 isa. 0.2048 b.0.7373 c.0.9421 d.0.0579* e. 0.2627

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previous year qustions ( 1st exam)

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