Scenario

Frank only had a brief introduction to statistics when he was in high school 12 years ago, and that did not cover inferential statistics. He is not confident in his ability to answer some of the problems posed in the course.

As Frank's tutor, you need to provide Frank with guidance and instruction on a spreadsheet he has partially filled out. Your job is to help him understand and comprehend the material. you should not simply be providing him with an answer, as this will not help when it comes time to take the test. Instead, be providing a step-by-step breakdown of the problems, including an explanation of why you did each step and using proper terminology. answer this question in excel

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 -1.25 and 0.54.

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2.The U.S. Airforce requires that pilots have a height between 64 in. and 77 in. If men's heights are normally distributed with a mean of 69.1 in. and a standard deviation of 5.3 in, find the percentage of men that meet the height requirement.

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3. Women's pulse rates are normally distributed with a mean of 77.5 beats per minute and a standard deviation of 11.6 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 =((77.5- 68))/(11.6)

z = 0.82

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

4.> What is the cumulative area from the left under the curve for a z-score of -0.78? What is the area on the right of that z-score? Hint: You will have two answers (one for the left and one for the right).

Student's partially finished answer:

The first part is to find the cumulative area from the left under the curve for a z-score of -0.78. This means that I need to find the probability that a z-score is less than -0.78.

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5.If the area under the standard normal distribution curve is 0.5883 from the right, what is the corresponding z-score?

Student's incorrect answer:

We plug in "=NORM.S.INV(0.5883)" into Excel and get a z-score of 0.22.

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

6.A research shows that the Richter scale magnitudes of earthquakes are normally distributed with a mean of 1.67 and a standard deviation of 0.385. Earthquakes with magnitudes less than 2.00 are considered "microearthquakes" that humans do not feel. What percentage of earthquakes fall into this category?

Student's partially finished answer:

We need to find the probability that earthquakes fall into the microearthquake category. The first step is to find the probability that the Richter scale is less than 2.00.

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