1) Assume that the data has a normal distribution and the number of observations is greater than fifty. Find the critical z value used to test a null hypothesis.

α = 0.05 for a two-tailed test.

Select one:

A. ±1.645

B. ±1.96

C. ±1.764

D. ±2.575

2) Assume that the data has a normal distribution and the number of observations is greater than fifty. Find the critical z value used to test a null hypothesis.

α = 0.09 for a right-tailed test.

Select one:

A. ±1.96

B. +1.34

C. +1.96

D. ±1.34

3) Assume that the data has a normal distribution and the number of observations is greater than fifty. Find the critical z value used to test a null hypothesis.

α = 0.05 for a left-tailed test.

Select one:

A. -1.96

B. ±1.645

C. -1.645

D. ±1.96

4) Assume that the data has a normal distribution and the number of observations is greater than fifty. Find the critical z value used to test a null hypothesis.

α = 0.1 for a two-tailed test.

Select one:

A. ±1.4805

B. ±2.33

C. ±1.645

D. ±2.052

5) Determine whether the hypothesis test involves a sampling distribution of means that is a normal distribution, Student t distribution, or neither.

Claim: μ = 959. Sample data: n = 25, x = 951, s = 25. The sample data appear to come from a normally distributed population with σ = 28.

Select one:

A. Neither

B. Normal

C. Student t

6) Determine whether the hypothesis test involves a sampling distribution of means that is a normal distribution, Student t distribution, or neither.

Claim: μ = 119. Sample data: n = 15, x = 103, s = 15.2. The sample data appear to come from a normally distributed population with unknown μ and

Select one:

A. Student t

B. Neither

C. Normal

7) Determine whether the hypothesis test involves a sampling distribution of means that is a normal distribution, Student t distribution, or neither.

Claim: μ = 78. Sample data: n = 24, x = 101, s = 15.3. The sample data appear to come from a population with a distribution that is very far from normal, and σ is unknown.

Select one:

A. Student t

B. Neither

C. Normal

8) A medical school claims that more than 28% of its students plan to go into general practice. It is found that among a random sample of 130 of the school's students, 32% of them plan to go into general practice. Find the P-value for a test of the school's claim.

Select one:

A. 0.3461

B. 0.3078

C. 0.1635

D. 0.1539

9) In a sample of 88 children selected randomly from one town, it is found that 8 of them suffer from asthma. Find the P-value for a test of the claim that the proportion of all children in the town who suffer from asthma is equal to 11%.

Select one:

A. 0.2157

B. 0.2843

C. -0.2843

D. 0.5686

10) In a sample of 47 adults selected randomly from one town, it is found that 9 of them have been exposed to a particular strain of the flu. Find the P-value for a test of the claim that the proportion of all adults in the town that have been exposed to this strain of the flu is 8%.

Select one:

A. 0.0524

B. 0.0024

C. 0.0262

D. 0.0048

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