Probablitiy QNT/351 Version 5

PROBABILITY

Maximum and Minimum Temperatures

Search the Internet for U.S. climate data.

Choose the city in which you live. 

Click on the tab that reads “Daily.” 

1.     See attachement that I have included:  Date, High Temperature, and Low Temperature.

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

3.     Calculate  and S. 

4.     What percentage of the high temperatures are within the interval   – S to  + S?

5.     What percentage of the high temperatures are within the interval   – 2S to  + 2S?

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

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

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