1. A meat inspector has been given the assignment of estimating the mean net mass of packages of ground chuck labelled "1.6 kg." Of course, he realizes that the masses cannot be precisely 1.6 kg. A sample of 38 packages reveals the mean mass to be 1.603 kg, with a standard deviation of 0.01 kg.(Round the final answers to 3 decimal places.)

a.What is the estimated population mean?

Population mean

kg

b.Determine a 98% confidence interval for the population mean.

The confidence interval for the population mean is between

1. A sample of 81 observations is taken from a normal population with a standard deviation of 5. The sample mean is 40. Determine the 95% confidence interval for the population mean.(Round the final answers to 3 decimal places.)

Confidence interval for the population mean is

1. The estimate of the population proportion is to be within plus or minus 0.09, with a 90% level of confidence. The best estimate of the population proportion is 0.47. How large a sample is required?(Round the final answer to the nearest whole number. Round the intermediate calculation to 2 decimal places. )

Sample size