# Question

The data represent the lengths in feet of three types of bridges in the United States. At α = 0.01, test the claim that there is no significant difference in the means of the lengths of the types of bridges.

If the null hypothesis is rejected, use the Scheffé test when the sample sizes are unequal to test the differences between the means, and use the Tukey test when the sample sizes are equal. Perform these steps.

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, and explain where the differences in means are.

Use the traditional method of hypothesis testing unless otherwise specified.

If the null hypothesis is rejected, use the Scheffé test when the sample sizes are unequal to test the differences between the means, and use the Tukey test when the sample sizes are equal. Perform these steps.

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, and explain where the differences in means are.

Use the traditional method of hypothesis testing unless otherwise specified.

## Answer to relevant Questions

The numbers of state parks found in selected states in three different regions of the country are listed below. At α = 0.05 can it be concluded that the average number of state parks differs by region? If the null ...A researcher wishes to see if there is a difference in the average number of times local police were called in school incidents. Samples of school districts were selected, and the numbers of incidents for a specific year ...83, 460, 582, 177, 241 Rank the set of data. A meteorologist suggests that the median number of deaths per year from tornadoes in the United States is 60. The number of deaths for a sample of 11 years is shown. At α = 0.05 is there enough evidence to reject the claim? ...8.2, 7.1, 6.3, 5.2, 4.8, 9.3, 7.2, 9.3, 4.5, 9.6, 7.8, 5.6, 4.7, 4.2, 9.5, 5.1 (98%) Find the confidence interval of the median, indicated in parentheses, for the set of data.Post your question

0