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2)Which of the following hypothesis...

2)Which of the following hypothesis tests use a z test statistic?

A) Matched Pairs

B) Single Proportion

C) Two Proportions

D) Goodness-of-Fit

E) Single Mean: σ Known

F) Independence

G) Two Variances

H) Single Mean: σ Not Known

I) Single Variance

J) Two Means: Independent Samples

3)Of 345 randomly selected medical students, 29 said that they planned to work in a rural community. Find a 95% confidence interval for the true proportion of all medical students who plan to work in a rural community.

A) (0.0493, 0.119)

B) (0.0456, 0.123)

C) (0.0548, 0.113)

D) (0.0595, 0.109)

4

A random sample of 16 women resulted in blood pressure levels with a standard deviation of 22.7 mm Hg. A random sample of 17 men resulted in blood pressure levels with a standard deviation of 20.6 mm Hg. Calculate the necessary test statistic to test the claim that blood pressure levels for women have larger variance than those for men.

A) 1.1019

B) 0.8235

C) 1.214

D) 0.9075

5

From the example statistics, find the value of p-bar used to test the hypothesis that the population proportions are equal.

n1 = 100 n2 = 100 p1 = 0.1 p2 = 0.12

A) 0.332

B) 0.110

C) 0.220

D) 0.138

6

Which of the following hypothesis tests use a χ2 test statistic?

A) Single Variance

B) Single Mean: σ Not Known

C) Matched Pairs

D) Two Proportions

E) Goodness-of-Fit

F) Independence

G) Single Mean: σ Known

H) Two Means: Independent Samples

I) Single Proportion

J) Two Variances

7

A laboratory tested 88 chicken eggs and found that the mean amount of cholesterol was 223 milligrams with σ = 10.3 milligrams. Construct a 95 percent confidence interval for the true mean cholesterol content, μ, of all such eggs.

A) (220, 224)

B) (220, 225)

C) (222, 226)

D) (221, 225)

8

Managers rate employees according to job performance and attitude. The results for several randomly selected employees are given below.

Performance 59 63 65 69 58 77 76 69 70 64

Attitude 72 67 78 82 75 87 92 83 87 78

Use the given data to find the equation of the regression line.

A) y = 2.81 + 1.35x

B) y = -47.3 + 2.02x

C) y = 11.7 + 1.02x

D) y = 92.3 - 0.669x

9

Managers rate employees according to job performance and attitude. The results for several randomly selected employees are given below.

Performance 59 63 65 69 58 77 76 69 70 64

Attitude 72 67 78 82 75 87 92 83 87 78

Find the value of the linear correlation coefficient r.

A) 0.610

B) 0.729

C) 0.916

D) 0.863

10

The effectiveness of a headache medicine is tested by measuring the intensity of a headache in patients before and after drug treatment. The data consist of before and after intensities for each patient. Determine whether the samples are independent or consist of matched pairs.

A) Matched Pairs

B) Independent Samples

11

A sociologist develops a test to measure attitudes about public transportation, and 27 randomly selected subjects are given the test. Their mean score is 76.2 and their standard deviation is 21.4. Construct the 95% confidence interval for the mean, μ, score of all such subjects.

A) (67.7, 84.7)

B) (64.2, 88.2)

C) (69.2, 83.2)

D) (74.6, 77.8)

12

The test statistic in a left-tailed test is z = -2.05. At a .05 significance level, would you reject the null hypothesis?

A) Yes

B) No

13

A psychologist develops a test to measure attitudes about public transportation, and 27 randomly selected subjects are given the test. Their mean score is 76.2 and their standard deviation is 21.4. Construct the 95% confidence interval for the standard deviation, σ, of the scores of all subjects.

A) (17.2, 27.2)

B) (16.6, 28.6)

C) (17.5, 27.8)

D) (16.9, 29.3)

14

Assume that the data has a normal distribution and the population standard deviation is known. Find the critical z value used for a two-tailed test with α = 0.05.

A) ±2.575

B) ±1.645

C) ±1.96

D) ±1.764

15

Use the margin of error, confidence level, and a standard deviation σ to find the minimu

A) Matched Pairs

B) Single Proportion

C) Two Proportions

D) Goodness-of-Fit

E) Single Mean: σ Known

F) Independence

G) Two Variances

H) Single Mean: σ Not Known

I) Single Variance

J) Two Means: Independent Samples

3)Of 345 randomly selected medical students, 29 said that they planned to work in a rural community. Find a 95% confidence interval for the true proportion of all medical students who plan to work in a rural community.

A) (0.0493, 0.119)

B) (0.0456, 0.123)

C) (0.0548, 0.113)

D) (0.0595, 0.109)

4

A random sample of 16 women resulted in blood pressure levels with a standard deviation of 22.7 mm Hg. A random sample of 17 men resulted in blood pressure levels with a standard deviation of 20.6 mm Hg. Calculate the necessary test statistic to test the claim that blood pressure levels for women have larger variance than those for men.

A) 1.1019

B) 0.8235

C) 1.214

D) 0.9075

5

From the example statistics, find the value of p-bar used to test the hypothesis that the population proportions are equal.

n1 = 100 n2 = 100 p1 = 0.1 p2 = 0.12

A) 0.332

B) 0.110

C) 0.220

D) 0.138

6

Which of the following hypothesis tests use a χ2 test statistic?

A) Single Variance

B) Single Mean: σ Not Known

C) Matched Pairs

D) Two Proportions

E) Goodness-of-Fit

F) Independence

G) Single Mean: σ Known

H) Two Means: Independent Samples

I) Single Proportion

J) Two Variances

7

A laboratory tested 88 chicken eggs and found that the mean amount of cholesterol was 223 milligrams with σ = 10.3 milligrams. Construct a 95 percent confidence interval for the true mean cholesterol content, μ, of all such eggs.

A) (220, 224)

B) (220, 225)

C) (222, 226)

D) (221, 225)

8

Managers rate employees according to job performance and attitude. The results for several randomly selected employees are given below.

Performance 59 63 65 69 58 77 76 69 70 64

Attitude 72 67 78 82 75 87 92 83 87 78

Use the given data to find the equation of the regression line.

A) y = 2.81 + 1.35x

B) y = -47.3 + 2.02x

C) y = 11.7 + 1.02x

D) y = 92.3 - 0.669x

9

Managers rate employees according to job performance and attitude. The results for several randomly selected employees are given below.

Performance 59 63 65 69 58 77 76 69 70 64

Attitude 72 67 78 82 75 87 92 83 87 78

Find the value of the linear correlation coefficient r.

A) 0.610

B) 0.729

C) 0.916

D) 0.863

10

The effectiveness of a headache medicine is tested by measuring the intensity of a headache in patients before and after drug treatment. The data consist of before and after intensities for each patient. Determine whether the samples are independent or consist of matched pairs.

A) Matched Pairs

B) Independent Samples

11

A sociologist develops a test to measure attitudes about public transportation, and 27 randomly selected subjects are given the test. Their mean score is 76.2 and their standard deviation is 21.4. Construct the 95% confidence interval for the mean, μ, score of all such subjects.

A) (67.7, 84.7)

B) (64.2, 88.2)

C) (69.2, 83.2)

D) (74.6, 77.8)

12

The test statistic in a left-tailed test is z = -2.05. At a .05 significance level, would you reject the null hypothesis?

A) Yes

B) No

13

A psychologist develops a test to measure attitudes about public transportation, and 27 randomly selected subjects are given the test. Their mean score is 76.2 and their standard deviation is 21.4. Construct the 95% confidence interval for the standard deviation, σ, of the scores of all subjects.

A) (17.2, 27.2)

B) (16.6, 28.6)

C) (17.5, 27.8)

D) (16.9, 29.3)

14

Assume that the data has a normal distribution and the population standard deviation is known. Find the critical z value used for a two-tailed test with α = 0.05.

A) ±2.575

B) ±1.645

C) ±1.96

D) ±1.764

15

Use the margin of error, confidence level, and a standard deviation σ to find the minimu

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