Test of a Single Variance · Exercise 25
For each word problem, use a solution sheet to solve the hypothesis test problem. Go to for the chi-square solution sheet. Round expected frequency to two decimal places.
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 3 minutes. To test her claim, Isabella 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, Statistics · §11.6 Test of a Single Variance · Exercise 25
No hints for this one.
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