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3/16/19

What is the confidence interval estimate of the population mean muμ​?

Quesiton : What is the confidence interval estimate of the population mean muμ​?



Answer: - determine the mean - determine the SD - use E=t*(S/SQR(n)) - SD is Sx






What is the confidence interval estimate of the population mean muμ​? Complete parts​ (a) and​ (b) below. A.What is the best point estimate of the population mean net change in LDL cholesterol after the garlic​ treatment? The best point estimate is 3.3 ​mg/dL. B.Construct a 99​% confidence interval estimate of the mean net change in LDL cholesterol after the garlic treatment. Chapter 7. Salaries of 47 college graduates who took a statistics course in college have a​ mean x of $61 000. Assuming a standard​ deviation of ​$13 424​ construct a 90​% confidence interval for estimating the population mean. This is the t*-value for a 95% confidence interval for the mean with a sample size of 10. (Notice this is larger than the z*-value which would be 1.96 for the same confidence interval .) You know that the average length is 7.5 inches the sample standard deviation is 2.3 inches and the sample size is 10. (a) construct the 99% confidence interval estimate of the mean pain score for patients given the magnet treatment. what is the confidence interval estimate of the population mean u? 6.8 < u < 9.2 (b) construct the 99% confidence interval estimate of the mean … Confidence Interval Calculator for the Population Mean . This calculator will compute the 99% 95% and 90% confidence intervals for the mean of a normal population given the sample mean the sample size and the sample standard deviation. Please enter the necessary parameter values and then click 'Calculate'. Related Resources. Confidence interval for a mean using t When sampling is from a normal distribution whose standard deviation is unknown the 100(1-) percent confidence interval for the population mean is given by: Deciding between z and t When constructing a confidence interval for a population mean we must decide whether to use z or t. In a random sample of 18 people the mean commute time to work was 34.5 minutes and the standard deviation was 7.1 minutes. Assume the population is normally distributed and use a t-distribution to construct a 80 % confidence interval for the population mean muμ. The result is called a confidence interval for the population mean When the population standard deviation is known the formula for a confidence interval (CI) for a population mean is deviation n is the sample size and z* represents the appropriate z *-value from the standard normal distribution for your desired confidence level. The Use of Confidence Intervals in Inferential Statistics Understanding Confidence Intervals How to Construct a Confidence Interval Confidence Interval Why are confidence intervals used? - Quora What is a 99 percent confidence interval? | Reference.com
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