find tc for a 95% confidence level when the sample size is 6.

If n = 530 and X = 424, construct a 99% confidence interval for the population proportion, p.Give your answers to three decimals < p <

Determine the point estimate of the population mean and margin of error for the confidence interval. Lower bound is 19, upper bound is 23. The point estimate of the population mean is

Determine the point estimate of the population mean and margin of error for the confidence interval.   Lower bound is 21​, upper bound is 29. The point estimate of the population mean is nothing.

If n = 120 and X = 96, construct a 90% confidence interval for the population proportion, p. Give your answers to three decimals < p <

The confidence interval for a population mean is (7.32, 7.52). What are the sample mean and the margin of error? H = Margin of Error = Give your answers as decimals, to two places.

Virginia wants to estimate the percentage of students who live more than three miles from the school. She wants to create a 95% confidence interval which has a margin of error of at most 5%. How many students should be polled to create the confidence interval? z0.10 z0.05 z0.025 z0.01 z0.005 1.282 1.645 1.960 2.326 2.576 Use the table of values above.

construct a confidence interval for this data. You should construct a 95% confidence interval for this data. How you do this will depend on  whether your data is summarized using a mean or proportions. If you have categorical data, you will have to pick one of the categories and focus on a confidence interval for the proportion for that category, and you only need to do one for that one category. Please show the parts of your equation (point estimate, Z or T, and standard error) in addition to your final result.

Assume that population means are to be estimated from the samples described. Use the sample results to approximate the margin of error and​ 95% confidence interval.   Sample size=64​, sample mean=69​, sample standard deviation=7 what is the margin of error

The quality control engineer should review lots of 200 items each. He decides that his study has a confidence of 95% and allow an error of 5%. Calculate the sample size to inspect a lot when you don't haveprevious information and then decrease the sample size with correction.