Search the Internet for U.S. climate data.

Choose Sierra Vista, Arizona

Click on the tab that reads Daily.

1. Prepare a spreadsheet with three columns:Date, High Temperature, and Low Temperature.List the past 60 days for which data is available.

1. Prepare a histogram for the data on high temperatures and comment on the shape of the distribution as observed from these graphs.

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1. Calculate X and S.

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1. What percentage of the high temperatures are within the interval X S to X + S?

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1. What percentage of the high temperatures are within the interval X 2S to X + 2S?

1. How do these percentages compare to the corresponding percentages for a normal distribution (68.26% and 95.44%, respectively)?

1. Repeat Parts 2 to 6 for the minimum temperatures on your spreadsheet.

1. Would you conclude that the two distributions are normally distributed?Why or why not?