...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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...Sosa batted .260 with 8 home runs and 25 RBIs in his first season with the Cubs. Although not spectacular numbers, it showed that Sosa improved as a hitter. In 1993, Sosa batted .261 with 33 home runs with 93 RBIs. He also showed his speed by stealing 38 bases. He became the Cubs' first 30-30 player in their history. Sosa continued to hit for power and speed in 1994 but he also improved his batting average. He ended up batting .300 with 25 home runs, 70 RBIs, and 22 stolen bases. Sosa was named to his first All-Star team in 1995. In 144 games, he batted .268 with 36 home runs and 119 RBIs. Sosa continued his success with the Cubs in 1996 as he batted .273 with 40 home runs and 100 RBIs. However, the next year, Sosa struggled. Despite hitting 36 home runs with 119 RBIs, Sosa batted just .251. He struggled to get on base(.300 on-base percentage) and led the league in strikeouts with 174. After years as a respected power/speed threat with a rocket arm in right field, he emerged during the 1998 season as one of baseball's greatest. It was in this season that both Sosa and Mark McGwire were involved in the "home run record chase", when both players' prowess for hitting home runs drew national attention as they attempted to pass Roger Maris' single season home run mark of 61 home runs that had stood since 1961. For the early months of the year, Sosa trailed McGwire significantly, being as many as 16 homers behind at one point in May. But as the chase progressed, Sosa would rally...
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