7 The Population Mean Annual Salary For Plumbers Is 46 700 With A Standard Deviation Of 55 600 A Random Sample Of 42 1 (29.23 KiB) Viewed 71 times
7 The Population Mean Annual Salary For Plumbers Is 46 700 With A Standard Deviation Of 55 600 A Random Sample Of 42 2 (29.23 KiB) Viewed 71 times
7. The population mean annual salary for plumbers is $46,700 with a standard deviation of 55,600. A random sample of 42 plumbers is drawn from this population. What is the probability that the mean salary of the sample is less than $44,000? 8. During a certain week the mean price of gasoline in California was $3.305 per gallon with a standard deviation of $0.049. A random sample of 38 gas stations is drawn from this population. What is the probability that the mean price for the sample was between $3.31 and $3.32 that week? 9. The mean height of women in the United States is 64.1 inches with a standard deviation of 2.71 inches. A random sample of 60 women is selected. What is the probability that the height for this sample would be greater than 66 inches?
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