Estimating the Difference between Two Population Proportions — Unit test
Question 8 • CA-Statistics and Probability B
A statistics class weighed 20 bags of grapes purchased from the store. The bags are advertised to contain 16 ounces, on average. The class calculated the 90% confidence interval for the true mean weight of bags of grapes from this store to be (15.875, 16.595) ounces. What is the correct interpretation of the 90 percent confidence interval?
Answer
A
90% of the bags of grapes in the sample weigh 16 ounces.
B
90% of the bags of grapes in the sample weigh between 15.875 and 16.595 ounces.
C
We are 90% confident that the interval from 15.875 ounces to 16.595 ounces captures the true mean weight of bags of grapes.
D
If many samples of size 20 were taken, and confidence intervals created for each sample, 90% of those confidence intervals would contain the true mean weight of bags of grapes.