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9. Hypothesis Testing for One Sample - 2! 1부
9. Hypothesis Testing for One Sample / Performing Hypothesis Tests: Variance / 문제 11
문제 11

The monthly rent (in dollars) paid by 1212 randomly selected residents in a city is listed below:
950950, 10201020, 990990, 980980, 10051005, 10151015, 995995, 10301030, 10101010, 10001000, 985985, 970970
At the α=0.05α=0.05 level of significance, is there sufficient evidence to conclude that the standard deviation of monthly rent is different from $25\(\text{\$}\)25? Assume the population is normally distributed.