From a random sample of 55 businesses, it is found that the mean time that employees spend on personal issues

each week is 4.9 hours with a standard deviation of 0.35 hours. What is the 95% confidence interval for the amount of time spent on personal issues?

(4.81, 4.99)

(4.83, 4.97)

(4.84, 4.96)

(4.82, 4.98)

Determine the minimum sample size required when you want to be 75% confident that the sample mean is within twenty-five units of the population mean. Assume a population standard deviation of 327.8 in a normally distributed population

@See text page 304

228

466

283

661

Determine the minimum sample size required when you want to be 80% confident that the sample mean is within 1.5 units of the population mean. Assume a population standard deviation of 9.24 in a normally distributed population.

@See text page 304

63

146

62

145

Looking for a Similar Assignment? Order now and Get 10% Discount! Use Coupon Code "Newclient"