Chapter 11, Problem 11.11TI

The FCC conducts broadband speed tests to measure how much data per second passes between a consumer’s

computer and the internet. As of August of 2012, the standard deviation of Internet speeds across Internet Service

Providers (ISPs) was 12.2 percent. Suppose a sample of 15 ISPs is taken, and the standard deviation is 13.2. An analyst

claims that the standard deviation of speeds is more than what was reported. State the null and alternative hypotheses,

compute the degrees of freedom, the test statistic, sketch the graph of the p-value, and draw a conclusion. Test at the1% significance level.