Chapter11and12Review

Chapter11and12Review - errors. 2. It is believed that...

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Chapter 11 and 12 Review 1. Listed below are baseball team statistics consisting of the proportion of wins and the results of this difference: Difference = (number of runs scored) – (number of runs allowed). The stats come from 7 different major league baseball teams. Is there sufficient evidence to conclude that there is a linear correlation between the proportion of wins and the above difference? (Let the proportion of wins be the independent variable.) Diff 163 55 -5 88 51 16 -214 Wins 0.599 0.537 0.531 0.481 0.494 0.506 0.383 a. Calculate the least squares line. b. Find the correlation coefficient. Is it significant? c. Find the estimated difference if the proportion of wins is 0.500. d. Find the estimated difference if the proportion of wins is 0.650. e. Does it appear that a line is the best way to fit the data? Make sure that on all of the following you can state both the null and alternate hypothesis, find the pvalue, make a decision, state the conclusion and identify the Type I and Type II
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Unformatted text preview: errors. 2. It is believed that public high school students attend school in equal numbers for each day of the school week. Suppose a sample of the days students were present at school was taken for one particular high school: Day of week Monday Tuesday Wednesday Thursday Friday Students present 1700 1850 1900 1875 1825 Do the students attend school in equal numbers for each day of the school week? 3. A study of the career plans of 386 young women and men sent a questionnaire at the College of Business Administration at the University of Illinois. One question asked which major within the business program the student had chosen. Here are the data from the students who responded. Female Male Accounting 68 56 Administration 91 40 Economics 5 6 Finance 61 59 Do the data suggest that there is a relationship between the gender of students and their choice of major?...
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