Question

Multiple Choice Questions

Q1. In a hypothesis test, Beta is best described by

P (Type I error)

P (Test Stat>|Observed Stat|)

Power

P (Type II error)

Q2. Which alternative hypothesis would I need to double the p-value in a test for the mean?

No feasible answer

Lower tailed alternative

Two sided alternative

Upper tailed alternative

Suppose our p-value is .184. What will our conclusion be at alpha levels of .10, .05, and .01?

We will reject Ho at alpha=.10 or .05, but not at alpha=.01

We will reject Ho at alpha=.10, .05, and .01

We will reject Ho at alpha=.10, but not at alpha=.05 or .01

What sample size would be needed for a confidence interval for the mean with a standard error of .5 and a standard deviation of 5.

Group of answer choices

100

10

40

20

Why would one use a nonparametric test instead of the two-sample t-test to test central tendency?

The sample size is over 40 from each population

The normality assumption has been violated and a small sample.

What determines whether we use the pooled or unpooled method for a confidence interval of a difference in population means?

The population variances

The population means

The Central Limit Theorem

A medical analyst, using a random sample of n = 500 families, obtained a 90 percent confidence interval for mean monthly family income for a large population: ($600, $800). If the analyst had used a 99 percent confidence level instead, the confidence interval would be:

narrower and would involve a larger risk of being incorrect

wider and would involve a larger risk of being incorrect

narrower and would involve a smaller risk of being incorrect

wider and would involve a smaller risk of being incorrect

What would be the value of U_s in the Wilcoxon Mann Whitney if the two samples you are comparing both have 4 data points and every sample is sample 1 is larger that every sample in sample 2?

8

16

4

2

Answer 1