Question
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
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
o.
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