Express the confidence interval (75.4 % , 87.6 % ) in the form ofp ± E.

A sample of 1100 observations taken from a population produced a sample proportion of 0.38. Make a 90 % confidence interval for Round your answers to three decimal places. = ( ) to ( )

Find the level of the confidence interval that has the value Za/2 = 1.28. (Round the final answer to three decimal places.)

Express the confidence interval 62.3%<p<78.3%62.3%<p<78.3% in the form of ˆp±Ep^±E.% ±± %

A researcher collected sample data for 15 middle-aged women. The sample had a mean serum cholesterol level (measured in milligrams per one hundred milliliters) of 192.7, with a standard deviation of 6. Assuming that serum cholesterol levels for middle-aged women are normally distributed, find a 99% confidence interval for the mean serum cholesterol level of all women in this age group. Give the lower limit and upper limit of the 99% confidence interval. Carry your intermediate computations to at least three decimal places. Round your answers to one decimal place. (If necessary, consult a list of formulas.) Lower limit: Upper limit: X Ś

Express the confidence interval 85.9%<p<91.9%85.9%<p<91.9% in the form of ˆp±Ep^±E.% ± %

A simple random sample of 44 female cottonmouths yeilded the number of young per liter. The sample mean calculated to 7.59.  Assume sigma = 2.4, obtain a 95% confidence interval for the mean number of young per litter of all female eastern cottonmouths.

A researcher collected sample data for 20 middle-aged women. The sample had a mean serum cholesterol level (measured in milligrams per one hundred milliliters) of 190.4, with a standard deviation of 9.7. Assuming that serum cholesterol levels for middle-aged women are normally distributed, find a 99% confidence interval for the mean serum cholesterol level of all women in this age group. Give the lower limit and upper limit of the 99% confidence interval.Carry your intermediate computations to at least three decimal places. Round your answers to one decimal place Lower limit= Upper limit=

Suppose that your​ 95% confidence interval for p is​ (0.68, 0.74). Based on the confidence interval what would your decision be for the hypothesis test​ H0: p=0.8 versus ​H1:p≠0.8 at the​ α=0.05 level?