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Unformatted text preview: 7.3 Population is self-employed persons with home-based businesses. The population varial is working hours per wee Mean = 23 hours Standard deviation = 1 7.32 Mean= 44.8 years standard deviation of all possible means = 0.9281 7.3 7.48 Sample mean is normally distributed with mean 35 and standard deviation 14 7.5 Sample mean follows naormal distribution 7.5 2 Considered large if greater than 30 The farther the variable under consideration is from being normally distributed, the larger the sample size must be an adequate approximation to the distribution to the sample mean 7.58 Standard deviation of the length of time that women with one job are employed during first 8yrs is 92 weks A . 92/square root 50 =13.01 days mean ucing errors ek e for a normal distribution to provide...
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- Spring '11