Question: The Eckel Manufacturing Company believes that their hourly wages follow a normal probability distribution. To confirm this, 270 employees were sampled, organized into the following

The Eckel Manufacturing Company believes that their hourly wages follow a normal probability distribution. To confirm this, 270 employees were sampled, organized into the following frequency distribution. Use the methods on pages 82–83 of Chapter 3 to find the mean and standard deviation of these data grouped into a frequency distribution. At the .10 significance level, is it reasonable to conclude that the distribution of hourly wages follows a normaldistribution?

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Hourly Wage f M fM Mx Mx2 fMx2 550 up to 650 20 6 120 2222 4938 988 650up to 750 24 7 168 1222 1494 ... View full answer

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