OpenStax, Introductory Business Statistics 2e §11.2 Test of a Single Variance · Exercise 23 · Statistics · Chi-square tests
Test of a Single Variance · Exercise 23
Isabella, an accomplished Bay to Breakers runner, claims that the standard deviation for her time to run the 7.5 mile race is at most three minutes. To test her claim, Rupinder looks up five of her race times. They are 55 minutes, 61 minutes, 58 minutes, 63 minutes, and 57 minutes.
Its source prints no answer for this problem, so there's nothing to check against.
OpenStax, Introductory Business Statistics 2e · §11.2 Test of a Single Variance · Exercise 23
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