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11.6 Exercise 9

Avg difficulty 2.5


Use the following information to answer the next three exercises. The standard deviation of heights for students in a school is 0.81. A random sample of 50 students is taken, and the standard deviation of heights of the sample is 0.96. A researcher in charge of the study believes the standard deviation of heights for the school is greater than 0.81.

State the null and alternative hypotheses.

OpenStax Statistics, 11.6 Test of a Single Variance, exercise 9

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Adapted from Statistics © 2022 Rice University. Licensed under CC BY 4.0. Source: Statistics. Imported at revision 7dea80a.