Instructions: The following questions on the next six tabs are shown to you by a student who is asking for help. Your job is to help the student walk through the problems by showing the student how to solve each problem in detail. You are expected to explain all of the steps in your own words.

Key:

- This problem is incorrect. Your job is to find the errors, correct the errors, and explain what they did wrong.

- This problem is partially finished. You must complete the problem by showing all the steps and explaining your corrections.

- This problem is blank. You must start from scratch and explain how you will approach the problem, how you solve it, and explain why you took each step.

question 1:

The average daily temperature in Orlando, Florida during the month of January follows a normal distribution with a mean of 59F and a standard deviation of 4F. What percentage of days in January, will the temperature be less than 57F in Orlando?

Show your calculations using Excel functions in the area to the right of this text box and answer the problem with explanations below.

Question 2:

The weight of boxes of Cheerios are normally distributed with a mean of 20 ounces with a standard deviation of 0.9 ounces. Find the probability that a randomly selected box of Cheerios will weigh more than 21.5 ounces.

Show your calculations using Excel functions in the area to the right of this text box and answer the problem with explanations below.

Question 3:

Women's pulse rates are normally distributed with a mean of 82 beats per minute and a standard deviation of 9.3 beats per minute. What is the z-score for a woman having a pulse rate of 68 beats per minute?

Student's incorrect answer:

Let z =(x-)/

z =((82-68))/(9.3)

z =1.51

Identify where the student went wrong when solving the problem above. Show how to correctly calculate the answer using Excel in the cells to the right of this text box. Finish the problem by stating how to correctly set up the problem and solve it below.