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

 A)four.
 B)zero.
 C)one.
 D)two.
 E)seven.
 
 
140.The following data are the magnitudes of earthquakes around the world recorded on January 13, 2008.
 
 4.1, 4.8, 3.1, 5.3, 5.1, 4.7, 3.0, 2.9, U, 4.6, 3.1, 3.0, U,  2.5.
 
Because of equipment problems, two earthquakes were unrecorded, although it was known that both had a value less than 2.7. The median magnitude of earthquakes on this date is
 A)2.95.
 B)3.9.
 C)4.0.
 D)3.1.
 E)This cannot be determined without knowing the exact value of the missing magnitudes.
 
 
141.Agricultural fairs often hold competitions for produce grown by local gardeners. The following data are the weight (in pounds) of tomatoes entered into an annual fair in Roland, Manitoba, Canada, in 2007.
 
2.48  1.52  1.15  1.13  1.00  0.99  0.96  0.94  0.75
 
The interquartile range (IQR) for these data is
 A)a value less than .40 pounds.
 B)a value between .50 pounds and .60 pounds.
 C)a value between .65 pounds and .75 pounds.
 D)a value greater than .80 pounds.
 
 
142.Agricultural fairs often hold competitions for produce grown by local gardeners. The following data are the weight (in pounds) of tomatoes entered into an annual fair in Roland, Manitoba, Canada, in 2007.
 
     2.48  1.52  1.15  1.13  1.00  0.99  0.96  0.94  0.75
 
Apply the 1.5 × IQR rule to the data to check for outlier values. In this case, _____________.
 A)there are no outliers
 B)the value 0.75 is the only outlier
 C)the values 0.75 and 2.48 are both outliers
 D)the value 2.48 is the only outlier
 E)the values 1.52 and 2.48 are both outliers
 
 
143.At a Canadian agricultural fair held in Neguac, New Brunswick, giant pumpkins were entered into a competition. The following stem-and-leaf plot of the weight (in pounds) of the 35 pumpkins in the competition was constructed, where, for example, 9|4 represents 940 pounds.
 

 
The quartiles, Q1 and Q3, for these data are
 A)Q1 = 90 and Q3 = 1190.
 B)Q1 = 320 and Q3 = 640.
 C)Q1 = 322 and Q3 = 716.
 D)Q1 = 320 and Q3 = 660.
 E)Q1 = 490 and Q3 = 660.
 
 
144.The New England Patriots are a top-ranked team in the National Football League and the Saskatchewan Roughriders are the 2007 champions of the Canadian Football League. From the 2007 rosters of these two teams, the weight of each player was determined and the following side-by-side boxplots of their weights is provided below.

Which of the following statements about these side-by-side boxplots is/are TRUE?
 A)The weights of the New England team exhibit less overall variation than the Saskatchewan team.
 B)The median weight for the New England team is higher than the median weight for the Saskatchewan team.
 C)The IQR for the Saskatchewan team is greater than the IQR of the New England team.
 
 
145.The fuel efficiencies of 2007 models of midsized automobiles were studied, and the side-by-side boxplots of the distribution of the miles per gallon in city driving (MPG-City) for automobiles manufactured in North America, Asia, and Europe are given below.

From these boxplots we can see that
 A)the MPG-City for 75% of automobiles from Asia is higher than the MPG-City for 75% of European automobiles.
 B)75% of the cars from Asia have higher fuel efficiency than 50% of the cars from North America.
 C)the median fuel efficiency rating is highest for automobiles manufactured in Asia.
 D)the overall variability in fuel efficiency rating is highest for European-built automobiles.
 E)all of the above are correct.
 F)A, B, and C are correct.
 
 
146.A study was conducted on the distance that various brand name golf balls would travel. The study involved the use of a standard testing machine using a seven iron. A selection of results from the study is given below for the distance (in yards) for each brand of ball.
 144.0   145.8   138.7    141.3   142.8    143.8    145.8    144.5
The mean  and the standard deviation s of these measurements (in yards) are, respectively,
 A)143.90 and 3.10.
 B)143.34 and 2.39.
 C)142.25 and 5.73.
 D)1.43.34 and 2.24.
 E)143.90 and 2.39.
 
 
147.A study was conducted on the distance that various brand name golf balls would travel. The study involved the use of a standard testing machine using a seven iron. It was determined that the mean distance was  = 237.8 yards with a standard deviation of s = 4.58 yards. It was later determined that the measuring instrument had been calibrated incorrectly and hence gave measurements that were consistently too large by 2.5 yards. Since the results of the study were to be published in Europe, it was desired to convert all measurements from yards into meters. A statistician determined that the appropriate transformation to correct the error and convert to meters in this case would be