Description

The exam includes 20 True/False, Matching type, Fill in the blanks and Multiple choice questions. 10 of the 20 questions will require the use of SPSS to answer the questions.

The exam will be 45 mins

The software is IBM SPSS version 27

POINTS

QUESTION

CORRECT

INCORRECT

PARTIAL CREDIT

1

Smaller sample size provides narrower estimates of a population parameter than large sample size

1/1

X True

> False

2

A mean could be a parameter or a statistic

1/1

> True

X False

3

1/1

A researcher conducted an observational study on the mean use of medications in a person’s lifetime for those

that are at least 50 years of age claiming it is different than 45 medications. The findings of the study among 1500

subjects showed 44 medications with a p-value of 0.509. The 95% CI for the difference would include the null

value of zero . Is this true or false?

> True

X False

4

1/1

A researcher conducted an observational study on the mean use of medications in a person’s lifetime for those

that are at least 50 years of age claiming it is different than 45 medications. The findings of the study among 1500

subjects showed 44 medications with a p-value of 0.509. The null hypothesis should be rejected. Is this true or

false?

1/1

X True

> False

5

Fifty bottles of water were randomly selected from a large collection of bottles in a company’s warehouse. These

fifty bottles are referred to as the:

> A: Sample

X B: Population

XC: Mu

X D: Sigma

6

A researcher postulates a hypothesis that tomato plants exhibit a higher rate of growth when planted in compost

rather than in soil. This is an example of which of the following:

> A: Alternative hypothesis

XB: Null hypothesis

XC: Vague hypothesis

X D: No hypothesis

1/1

7

Which of the following statements is true regarding the above figure?

1/1

XA: The mean age of whites is significantly different than African Americans

X B: The mean age of whites is significantly different than others

X C: The mean age of others is significantly different than African Americans

X D: All means are significantly different than one another

> E: The age of all three groups are not significantly different

8

The mean age of a group of 75 patients is 42.42 years with a standard error of 2.14. Given the standard deviation

is stable, the interval estimate of the puopuation mean is expected to be

with larger sample

size

1/1

XA: Wider

> B: Narrower

X C: No change

X D: Both directions

1/1

The mean age of a group of 75 patients is 42.42 years with a standard error of 2.14. If the variation of the data

increases due to data entry error for the 75 subjects, we expect the standard error to:

> A: Increase

X B: Decrease

X C: No change

X D: Both directions

The mean age of a group of 75 patients is 42.42 years with a standard error of 2.14. If the variation of the data

10

increases due to data entry error for the 75 subjects, we expect the standard deviation to:

1/1

> A: Increase

X B: Decrease

X C: No change

X D: Both directions

Question 1

FLAG QUESTION

What is true about the standard error of the mean?

Currently Selected : B

A

It increases as n increases.

o

B It decreases as n increases.

C It does not change with respect to n.

o

D It is equivalent to the standard deviation.

o

Question 2

FLAG QUESTION

A study is conducted to examine the impact of a new medicine on the cholesterol level in adult males. A group of 100 subjects had their blood tested to examine their cholesterol

level, and they were then given a medicine for 1 week, after which their cholesterol was again measured. The most appropriate parametric statistical test to examine the impact

of a new medicine on the cholesterol level would be:

Answers A-D

A

One sample t-test

o

B

Paired t-test

o

C Independent t-test

o

D

Clinical trial

O

Question 3

FLAG QUESTION

In 1994, Nichol et al. carried out a study in which working adults between the ages of 18 and 64 were enrolled in a study of the effectiveness of influenza vaccine. A total of 848

subjects were enrolled, of which 424 received the active vaccine, and 424 received the placebo vaccine. The most appropriate non-parametric statistical test to examine the

effectiveness of influenza vaccine when compared to placebo would be:

Answers A-F

A

One sample t-test

O

B

Paired t-test

o

C Independent t-test

o

D Run’s test

E Mann-Whitney test

o

F Wilcoxin signed rank test

o

Question 4

FLAG QUESTION

The data provided is based on a study in which patients who participated in a double-blind, randomized controlled trial (RCT) were randomly placed in two treatment

groups. The treatment groups are: Enoxaparin 1.0 mg/kg and 5mg Warfarin. After treatment in the two different groups, the heart rates (bpm) of patients were

collected. The study is conducted to test the claim that the Enoxaparin group and Warfarin group come from populations with the same mean. Please refer to the

following information listed here to complete this question. Enoxaparin group: n = 34, sample mean = 59 bpm, s = 2.47 Warfarin group: n = 40, sample mean = 54

bpm, s = 3.45

Based on the information listed above, using a significance level of a = 0.05 and obtaining the p-value of 0.008. please select from the following responses of what can be

concluded:

Currently Selected : B

A

The bpm of the two groups are significantly different

B

The bpm of the two groups are not significantly different

0

ÃÂ¡

There is not enough evidence to make any conclusions

Question 5

FLAG QUESTION

Which of the following experimental Ã¢â‚¬Å“blindingÃ¢â‚¬Â techniques refers to when the investigators and the subjects are unaware of the treatment assignments in the experiment?

Currently Selected : B

A Single-blinded study

o

B

Double-blinded study

C Triple-blinded study

o

D

Non-blinded study

O

E

None of the responses

o

Question 5

FLAG QUESTION

Which of the following experimental Ã¢â‚¬Å“blindingÃ¢â‚¬Â techniques refers to when the investigators and the subjects are unaware of the treatment assignments in the experiment?

Currently Selected : B

A Single-blinded study

o

B

Double-blinded study

C Triple-blinded study

o

D

Non-blinded study

O

E

None of the responses

o

Question 6

FLAG QUESTION

Equal variance assumption has to be checked when comparing the mean of blood pressure of pre and post treatment

Currently Selected : B

A True

B

False

Question 7

FLAG QUESTION

…

Question #7 attachment

Indicate the most appropriate non-parametric test to compare time using emails by gender for the attached table:

Group Statistics

Currently Selected : B

N

Time Using Email (Day 2)

Gender

Male

Female

8

8

Mean

5.0000

32.0000

Std. Deviation

4.50397

40.04640

Std. Error

Mean

1.59239

14.15854

A

Wilcoxon signed ranks test.

B

Mann-Whitney test

ÃÂ¡

Independent samples t-test

o

D

Paired t-test

o

E Median test

o

Question 8

FLAG QUESTION

Question #8 attachment

The image indicates that the assumption for the paired t-test is met to compare the pre and post measurements

Currently Selected: A

A True

B

False

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attachment