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Instructions: The following worksheet is shown to you by a student who is asking for help. Your job is to help the student walk through

Instructions:The following worksheet is 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.

Key:

  • - This problem is an 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 steps while explaining yourself.

  • - 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.
  1. Assume that a randomly selected subject is given a bone density test. Those tests follow a standard normal distribution. Find the probability that the bone density score for this subject is between -1.53 and 1.98

Student's answer:We first need to find the probability for each of these z-scores using Excel.

For -1.53 the probability from the left is 0.0630, and for 1.98 the probability from the left is 0.9761.

Help with Excel and explaining this

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