Assume that population mean is to be estimated from the sample described. Use the sample results to approximate the margin of error and​ 95% confidence interval.   n=36​, x=67.9 ​seconds, s=4.1 seconds       The margin of error is nothing seconds.

Construct a confidence interval of the population proportion at the given level of confidence. X = 30 n = 150 C-Level = 0.90 Lower Level = ? Upper Level = ?

State the exact distribution to use when calculating the confidence interval.

Use the confidence interval to find the estimated margin of error. Then find the sample mean.   A biologist reports a confidence interval of (2.3,3.3) when estimating the mean height​ (in centimeters) of a sample of seedlings.       Question content area bottom Part 1 The estimated margin of error is enter your response here   . Part 2 The sample mean is enter your response here   .

Use the confidence interval to find the margin of error and the sample mean.   (0.676,0.800)

Use the confidence interval to find the margin of error and the sample mean. (1.57,1.97)

Assume that you want to construct a​ 95% confidence interval estimate of a population mean. Find an estimate of the sample size needed to obtain the specified margin of error for the​ 95% confidence interval. The sample standard deviation is given.   Margin of​ error, E=3.4 minutes; sample standard​ deviation, s=55.3minutes       The required sample size is?

Determine the point estimate of the population mean and margin of error for the confidence interval. Lower bound is 15, upper bound is 27. The point estimate of the population mean is The margin of error for the confidence interval is

Use the normal distribution to find a confidence interval for a proportion p given the relevant sample results. Give the best point estimate for p, the margin of error, and the confidence interval. Assume the results come from a random sample. A 99% confidence interval for p given that p = 0.75 and n = 110. Round your answer for the point estimate to two decimal places, and your answers for the margin of error and the confidence interval to three decimal places. Point estimate = Margin of error = + i The 99% confidence interval is to i

Determine the point estimate of the population mean and margin of error for the confidence interval. Lower bound is 16, upper bound is 26. The point estimate of the population mean is