...Solution to Chapter 2 Internet Project Data on the Internet Note: In exercises 1 and 2 the data for the year 2000 is used. Exercise 1 Using the daily mean temperatures, compute the range and standard deviation in temperature for San Francisco in January 2000. Answer The mean daily temperatures for each of the days in January 2000 as compiled by the Weather Underground are 50.8 48.5 47.8 55.9 52.1 47.8 47.7 50.5 51.3 52.4 54.1 49.6 50.5 52.6 53.9 56.4 50.5 52.8 55.5 55.3 52.4 53.6 54.6 56.2 54.4 51.5 50.5 50.3 51.1 54.9 52.6 . For this data n = 31 ∑ x = 1618.1 ∑ x 2 = 84653.61 so the mean and standard deviation are x= 1618.1 = 52.20 31 and s= 31(84653.61) − (1618.1) 2 = 2.54 . 31(30) Exercise 2 The National Football League uses a long list of criteria to determine if a city is a candidate to host the Super Bowl. One such requirement is that the city either must have a domed (i.e. heated) football stadium or that the average temperature in January for the city must be 50o F or higher. San Francisco does not have a domed stadium. Based on the January 2000 data, would San Francisco satisfy this Super Bowl eligibility criterion? Answer Yes, since the average from Exercise 1 is 52.20. Exercise 3 Which graph below best represents the performance of Microsoft stock during the first four months of 2000? Answer Graph B shows the history of Microsoft stock prices over the indicated period. Note the data is graphed in the form it is provided on the Yahoo! finance site so that January...
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