Test of a Single Variance · Exercise 4
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.
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OpenStax, Introductory Statistics 2e · §11.6 Test of a Single Variance · Exercise 4
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