Introduction to the Practice of Statistics 9th edition by David S. Moore Test bank

 B)238.48 dollars2
 C)50,555.54 dollars2
 D)56,875 dollars2
 
 
124.During the early part of the 1994 baseball season, many sports fans and baseball players noticed that the number of home runs being hit seemed to be unusually large. The numbers of home runs by American League and National League teams based on the team-by-team statistics on home runs hit through Friday, June 3, 1994, are given below (from the Columbus Dispatch, Sunday, June 5, 1994).
 
American League
35     40     43     49     51     54     57     58     58     64     68     68     75     77
 
National League
29     31     42     46     47     48     48     53     55     55     55     63     63     67
 
What is the mean number of home runs hit by American League teams?
 A)48.5
 B)56.9
 C)57.5
 D)58.1
 
 
125.During the early part of the 1994 baseball season, many sports fans and baseball players noticed that the number of home runs being hit seemed to be unusually large. The numbers of home runs by American League and National League teams based on the team-by-team statistics on home runs hit through Friday, June 3, 1994, are given below (from the Columbus Dispatch, Sunday, June 5, 1994).
 
American League
35     40     43     49     51     54     57     58     58     64     68     68     75     77
 
National League
29     31     42     46     47     48     48     53     55     55     55     63     63     67
 
The mean and standard deviation of the number of home runs hit by National League teams are 50 and 11, respectively. Suppose we wish to measure how many more home runs than last year's average of 40 these teams have had this year by subtracting 40 from each number (a team with 55 home runs has 55 – 40 = 15 more home runs than last year's average). What are the mean and standard deviation of these new numbers?
 A)50 and 11
 B)10 and 11
 C)50 and –29
 D)10 and –29
 
 
126.In a statistics class with 136 students, the professor records how much money each student has in their possession during the first class of the semester. The histogram shown below represents the data he collected.
 

 
From the histogram, which of the following is TRUE?
 A)The mean is larger than the median.
 B)The mean is smaller than the median.
 C)The mean and median are approximately equal.
 D)It is impossible to compare the mean and median for these data.
 
 
127.In a statistics class with 136 students, the professor records how much money each student has in their possession during the first class of the semester. The histogram shown below represents the data he collected.
 

 
What is the range of the data set?
 A)90
 B)100
 C)110
 D)This cannot be determined from just the histogram.
 
 
128.The Michigan Department of Transportation (M-DOT) is working on a major project: 80% of the highways in Michigan need to be repaved. To speed completion of this project, many contractors will be working for M-DOT. Contractors are currently bidding on the next part of the project. To help make a decision about which contractor to hire, M-DOT collects many variables besides just the estimated cost. One of those variables is the contractor's estimate of the number of workdays required to finish the job. Twenty contractors have bid on the next job. The boxplot below represents their estimates of the number of work days required.

 
What is (approximately) the interquartile range, based on the boxplot?
 A)140 days
 B)270 days