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​? 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. 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. 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. 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. An IQ test is designed so that the mean is 100 and the standard deviation is 2020 for the population of normal adults. Find the sample size necessary to estimate the mean IQ score of statistics students such that it can be said with 9090 % confidence that the sample mean is within 77 IQ points of the true mean . Wed Jul 16 2014 00:00:00 GMT+0530 (IST) · How do I calculate a confidence interval to estimate a population mean when the population standard deviation is given? If you don’t know your population mean (μ) but you do know the standard deviation (σ) you can find a confidence interval for the population mean with the formula: x̄ ± z* σ / (√n) Sample problem: Construct a 95 % confidence interval an experiment that found the sample mean temperature for a certain city in August was 101.82 with a population standard deviation of 1.2. A 95 % confidence interval does not mean that 95% of the sample data lie within the interval . A confidence interval is not a definitive range of plausible values for the sample parameter though it may be understood as an estimate of plausible values for the population parameter. 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 Jerzy Neyman Bradley Efron Sal Mineo Standard deviation Normal distribution Student's t-distribution