# STATISTICS HHOMEWORK 4 ASSIGNMENT 2015

August 30, 2017

Question

A poll is conducted with 1434 randomly selected U.S. adults. The poll showed that 72% of the respondents support gun rights. The sample results are n = 1434 and= 0.72. Find the confidence Interval that corresponds to a 95% confidence interval.

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A poll is conducted with 1845 randomly selected U.S. adults. The poll showed that 46% of the respondents believe in cold fusion. The sample results are n = 1845 and Find the margin of Error that correspond to a 90% confidence interval.

E =

The mean MPG of a mid-sized sedan is 24.6. If a hypothesis test is performed, how should you interpret a decision that rejects the null hypothesis? Circle the correct answer.

There is sufficient evidence to support the claim.

There is sufficient evidence to reject the claim.

Suppose we are testing the following hypotheses:Determine the nature of the hypothesis test.

Suppose we are testing the following hypotheses:Determine the nature of the hypothesis test.

Suppose we are testing the following hypotheses:Determine the nature of the hypothesis test.

For what is the critical value z for a sample withn= 30 and?

For what is the critical value z for a sample withn= 10 and?

Which of the following statements is true?

The level of significance,, is the maximum alternative allowable probability of making a Type II error.

The level of significance,, is the minimum alternative allowable probability of making a Type II error.

The level of significance,, is the maximum alternative allowable probability of making a Type I error.

The level of significance,, is the minimum alternative allowable probability of making a Type I error.

What is the critical value for a right-tailed test with= 0.01 of a large population?

The mean cost of a computer is \$432. If a hypothesis test is performed, how should you interpret a decision that supports the null hypothesis? Circle the correct answer.

There is sufficient evidence to support the claim.

There is sufficient evidence to reject the claim.

True or False: The degree of freedom is equal to the sample size (n).

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