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Based on the information give for each of the following studies, decide whether to reject the null hypothesis, for each, give the Z- score cutoff (or cutoffs) on the comparison distribution at which the null hypothesis should be rejected, the Z score on the comparison distribution for the sample score, and your conclusion. Assume that all populations are normally distributed.
Study
N
S
Sample score
P tail of test
A
5
1
7
.051 (high predicted)
B
.052
C
.011 (high predicted)
D
.012
What is the likelihood the sample mean is greater than $22.50 but less than $25.00?
Test hypothesis that annual incomes of corporate trainers in areas of more than 500,000 are considerably more than those in areas of less than 100,000. Make use of the 5% level of risk.
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The upper limit of a 95% confidence interval for the population mean would equal:
Which is the probability that the median of the sample is between $17 and $20?
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Reading highway signs is not always easy, especially if your vision is imperfect. Vision in general tends to deteriorate with age. Two researchers conducted a study to determine if the distance at which a standard highway sign could be recognized ..
Describe the sampling distribution of the sample proportion
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