Question

question 23 (3 points)
if production machinery is supposed to produce cereal boxes of 510 grams and the 99% confidence interval for the mean weight of the boxes is between 504.52 grams and 515.48 grams, is the machinery operating properly?
yes, the machinery is operating properly because the expected weight of 510 grams does fall within the 99% confidence interval.
yes, the machinery is operating properly because the expected weight of 510 grams does fall within the 95% confidence interval.
no, the machinery is not operating properly because the expected weight of 510 grams does not fall within the 95% confidence interval.
no, the machinery is not operating properly because the expected weight of 510 grams does not fall within the 99% confidence interval.
question 24 (3 points)
a 95% confidence interval for the mean weight of apples from an orchard is (130 grams, 160 grams). which of the following is the best interpretation of this interval?
we are 95% confident that the true mean weight of all apples from the orchard is between 130 and 160 grams.
95% of all apples weigh between 130 and 160 grams.
there is a 95% chance that a randomly selected apple will weigh between 130 and 160 grams.
the mean weight of the sampled apples is between 130 and 160 grams.

Explanation:

Answer:

(23) A. Yes, the machinery is operating properly because the expected weight of 510 grams does fall within the 99% confidence interval.
(24) A. We are 95% confident that the true mean weight of all apples from the orchard is between 130 and 160 grams.