Test of a Single Variance · Try It 2
The FCC conducts broadband speed tests to measure how much data per second passes between a consumer’s computer and the internet. At a certain point in time, 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 the 1% significance level.
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OpenStax, Introductory Statistics 2e · §11.6 Test of a Single Variance · Try It 2
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