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Question : Fifty cities provided information on vacancy rates (


Fifty cities provided information on vacancy rates (in percent) in local apartments in the following frequency distribution. The sample mean and the sample standard deviation are 9% and 3.6%, respectively

Vacancy ………………………………………………………………………………… Rate Frequency
Less than 6 ………………………………………………………………………………………………. 10
6 up to 9 …………………………………………………………………………………………………… 10
9 up to 12 …………………………………………………………………………………………………... 20
12 or more …………………………………………………………………………………………………. 10

Apply the goodness-of-fit test for normality at the 5% significance level. Do the sample data suggest that vacancy rates do not follow the normal distribution?