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 percent confidence interval for the true mean weight of bags of grapes from this store to be open paren 15 point 8 7 5 comma 16 point 5 9 5 close paren ounces. What is the correct interpretation of the 90 percent confidence interval?
Answer
A
90 percent of the bags of grapes in the sample weigh 16 ounces.
B
90 percent of the bags of grapes in the sample weigh between 15 point 8 7 5 and 16 point 5 9 5 ounces.
C
We are 90 percent confident that the interval from 15 point 8 7 5 ounces to 16 point 5 9 5 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 percent of those confidence intervals would contain the true mean weight of bags of grapes.