# Question: In Exercise 9 31 two intervals were given for the same

In Exercise 9.31, two intervals were given for the same data, one for 95% confidence and one for 90% confidence.

a. How would a 99% interval compare? Would it be narrower than both, wider than both, or between the two in width. Explain.

b. If we wanted to use a 99% confidence level and get a narrower width, how could we change our data collection?

a. How would a 99% interval compare? Would it be narrower than both, wider than both, or between the two in width. Explain.

b. If we wanted to use a 99% confidence level and get a narrower width, how could we change our data collection?

## Answer to relevant Questions

State whether each of the following changes would make a confidence interval wider or narrower. (Assume that nothing else changes.) a. Changing from a 90% confidence level to a 99% confidence level. b. Changing from a sample ...Data on the disk and website show reaction distances in centimeters for the dominant hand for a random sample of 40 independently chosen college students. Smaller distances indicate quicker reactions. a. Make a graph of the ...The mean weight of all 20-year old women is 128 pounds (http://www.kidsgrowth.com). A random sample of 40 vegetarian women who are 20 years old showed a sample mean of 122 pounds with a standard deviation of 15 pounds. The ...Minitab output is shown for a two-sample t-interval for the number of televisions owned in households of random samples of students at two different community colleges. Each individual was randomly chosen independently of ...A random sample of male college baseball players and a random sample of male college soccer players were obtained independently and weighed. The table shows the unstacked weights (in pounds). The distributions of both data ...Post your question