Module 5 Homework 8.2-Confidence Intervals - Mean
Question 3 of 5 (1 point) | Question Attempt: 1 of Unlimited
A political newspaper, Politically Sound, is interested in the distances voters in Grand Ridge County live from their nearest polling station. Politically Sound has
hired you to estimate the population mean of all such distances for voters in this county. To estimate this population mean, you select a random sample of 19
Grand Ridge County voters and record the distance (in km) each voter lives from their nearest polling station. Assume the population is approximately
normally distributed.
Based on your sample, follow the steps below to construct a 99% confidence interval for the population mean of all the distances voters in Grand Ridge County
live from their nearest polling station. (If necessary, consult a list of formulas.)
(a)
Click on "Take Sample" to see the results for your random sample.
Take Sample
Number of voters
19
Sample standard
Sample mean
deviation
4.741
2.252
need fo for your 99%
Enter the values of the sample size, the point estimate of the mean, the sample standard deviation, and the critical value you
confidence interval. (Choose the correct critical value from the table of critical values provided.) When you are done, select "Compute".
Sample size:
Π
Point estimate:
Standard error:
Sample standard deviation:
Margin of error:
X
5
A
