1 . The personnel Idepartment of a large corporation wants to estimate the family dental expenses of its employees. A random sample of
10 employees reveals the following family dental expenses ($) for the preceding year: 5, 7, 8, 3, 4, 6, 7, 4, 8, 9,, Set up a 98% confidence
interval estimate of the mean family dental expenses for all employees. Formula ,....Gn'u ml Values C.I.E. 2. If x'=95, 0 =24 and n = 36, construct a 95% confidence interval estimate of the population mean, 14. Formula ,...Gn'u fial Values C.I.E. 3. The price per gallon of unleaded gasoline at service station in a large city is normally distributed with a population mean
of 80.7 cents and a standard deviation of 3 cents, what proportion of the service stations have a price per gallon for gasoline :1 below 78.? and above 82 cents
h between 80.7 and 78.7 a do part 3 assuming n = 9

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