# For these exercises, perform each of these steps. Assume that all variables are normally or approximately normally

## Question:

For these exercises, perform each of these steps. Assume that all variables are normally or approximately normally distributed.

a. State the hypotheses and identify the claim.

b. Find the critical value(s).

c. Compute the test value.

d. Make the decision.

e. Summarize the results.

Use the traditional method of hypothesis testing unless otherwise specified and assume the variances are unequal.

Find the 95% confidence interval for the difference of the means in Exercise 6 of this section.

**Data from in Exercise 6**

Upright vacuum cleaners have either a hard body type or a soft body type. Shown are the weights in pounds of a random sample of each type. At α = 0.05, can it be concluded that the means of the weights are different?

## Step by Step Answer:

**Related Book For**

## Elementary Statistics A Step By Step Approach

**ISBN:** 9780077665807

9th Edition

**Authors:** Allan G. Bluman