Question: The lengths in feet of a random sample of suspension

The lengths (in feet) of a random sample of suspension bridges in the United States, Europe, and Asia are shown. At α = 0.05, is there sufficient evidence to conclude that there is a difference in mean lengths?
Assume that all variables are normally distributed, that the samples are independent, and that the population variances are equal. Also, for each exercise, perform the following steps.
a. State the hypotheses and identify the claim.
b. Find the critical value.
c. Compute the test value.
d. Make the decision.
e. Summarize the results, and explain where the differences in the means are.
Use the traditional method of hypothesis testing unless otherwise specified.

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  • CreatedSeptember 02, 2015
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