Question 6

A machine fills sugar boxes in such a way that the weights (in grams) are normally distributed with a mean of 2260 g and a standard deviation of 20 g. Another machine checks the weights and rejects packages in the bottom 1% of weights and the top 1% of weights. Find the the minimum and maximum acceptable weights. Answer using whole numbers and enter the bottom 1% value in blank 1 and the top 1% in blank 2.

Question 6 options:

Blank # 1

Blank # 2

Question 7

Final numeric grades in a certain course are normally distributed with a mean of 72.3 and a standard deviation of 6.4. The professor curves the grades so that the top 8% of students will receive an A. What is the minumum numeric grade you have to earn to obtain an A?

Question 8

Final numeric grades in a certain course are normally distributed with a mean of 72.3 and a standard deviation of 6.4. The professor curves the grades so that the bottom40% of students will receive an F. What is the minumum numeric grade you have to earn to pass the class?

Question 9

The amount of time needed for a mail carrier to cover his route is approximately normally distributed with a mean of 400 minutes and a standard deviation of 18 minutes. Find the value that represents the 20th percentile of delivery times. Answer with a whole number.

Question 10

Scores on a college entrance exam are normally distributed with a mean of 550 and a standard deviation of 100. Find the value that represents the 90th percentile of scores. Answer with a whole number.