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Empirical Rule,

Steps to Complete Lab

Use the Weeks 3 and 5 spreadsheets to help you answer the questions below.

Step 1: Survey or measure 10 people to find their heights. Determine the mean and standard deviation for this group by using the Week 3 Excel spreadsheet. Post a screen shot of the portion of the spreadsheet that helped you determine these values. How does your height compare to the mean (average) height of the group that you surveyed? Is your height taller, shorter, or the same as the mean of your group?

Step 2: Give some background information on the group of people you used in your study. You might consider using the following questions to guide your answer.


  1. How did you choose the participants for your study (sampling method)?
  2. What part of the country did your study take place in?
  3. What are the age ranges of your participants?
  4. How many of each gender did you have in your study?
  5. What are other interesting factors about your group?

Step 3: Use the Excel spreadsheet for the following.

  1. (Use the Empirical Rule tab from the spreadsheet). Determine the 68%, 95%, and 99.7% values of the Empirical Rule in terms of the ten heights in your height study.
  2. What do these values tell you?
  3. Post a screen shot of your work of Excel spreadsheet.
  4. (Use the normal probability tab from the spreadsheet). Based on your study results, what percent of the study participants are shorter than you? What percent are taller than you?
  5. Post a screen shot of your work of Excel spreadsheet.
    Example: If my height is 73 inches, then 20.86% of the relevant population is shorter. The other 79.14%, of course, is taller.

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