In Exercises 26, use the P-value method to perform the hypothesis test for the indicated exercise.
Exercise 20
A school administrator claims that the standard deviation for eighth-grade students on a U.S. history assessment test is greater than 30 points. A random sample of 18 eighth-grade students has a standard deviation of 30.6 points. At α = 0.01, is there enough evidence to support the administrator’s claim?