# Question: The cheetah Acinonyx jubatus is the fastest land mammal and

The cheetah (Acinonyx jubatus) is the fastest land mammal and is highly specialized to run down prey. The cheetah often exceeds speeds of 60 mph and, according to the online document "Cheetah Conservation in Southern Africa" (Trade & Environment Database (TED) Case Studies, Vol. 8, No. 2) by J. Urbaniak, the cheetah is capable of speeds up to 72 mph. The WeissStats CD contains the top speeds, in miles per hour, for a sample of 35 cheetahs. Use the technology of your choice to do the following tasks.

a. Find a 95% confidence interval for the mean top speed, μ, of all cheetahs. Assume that the population standard deviation of top speeds is 3.2 mph.

b. Obtain a normal probability plot, boxplot, histogram, and stem-and-leaf diagram of the data.

c. Remove the outliers (if any) from the data, and then repeat part (a).

d. Comment on the advisability of using the z-interval procedure on these data.

a. Find a 95% confidence interval for the mean top speed, μ, of all cheetahs. Assume that the population standard deviation of top speeds is 3.2 mph.

b. Obtain a normal probability plot, boxplot, histogram, and stem-and-leaf diagram of the data.

c. Remove the outliers (if any) from the data, and then repeat part (a).

d. Comment on the advisability of using the z-interval procedure on these data.

## Relevant Questions

The U.S. Census Bureau compiles data on family size and presents its findings in Current Population Reports. Suppose that 500 U.S. families are randomly selected to estimate the mean size, μ, of all U.S. families. Further ...In each part, explain the effect on the margin of error and hence the effect on the precision of estimating a population mean by a sample mean. a. Increasing the confidence level while keeping the same sample size. b. ...Formula 8.1 provides a method for computing the sample size required to obtain a confidence interval with a specified confidence level and margin of error. The number resulting from the formula should be rounded up to the ...Consider again the problem of estimating the mean age, μ, of all people in the civilian labor force. In Example 8.7 on page 322, we found that a sample size of 2250 is required to have a margin of error of 0.5 year and a ...The American Express Retail Index provides information on budget amounts for home improvements. The following table displays the budgets, in dollars, of 45 randomly sampled home improvement jobs in the United States. a. ...Post your question