Question Details

41. A company collected the ages from a random sample of its middle managers with the resulting frequency distribution shown below:
  
What is the relative frequency for the largest interval? 
A. .132
B. .226
C. .231
D. .283
E. .288

42. A company collected the ages from a random sample of its middle managers with the resulting frequency distribution shown below:
  
What is the midpoint of the third class interval? 
A. 22.5
B. 27.5
C. 32.5
D. 37.5
E. 42.5

43. The 550 students answered an additional question with the following results based on their rating of their instructor:
  
What proportion of the students who rated their instructor as very or somewhat effective received a B or better in the class? 
A. 0.345
B. 0.254
C. 0.482
D. 0.898
E. 0.644

44. The 550 students answered an additional question with the following results based on their rating of their instructor:
  
What proportion of all 550 students received less than a C? 
A. 0.03
B. 0.06
C. 0.08
D. 0.13
E. 0.15

45. 822 customers were randomly selected from those who had recently bought a book over the internet. The chart below shows the breakdown of the classification of the book type:
  
What percentage of the books purchased were either mystery or science fiction/fantasy? 
A. 18.61
B. 36.50
C. 17.88
D. 24.33
E. 22.99

46. 822 customers were randomly selected from those who had recently bought a book over the internet. The chart below shows the breakdown of the classification of the book type:
  
What percentage of the books purchased were self-help books? 
A. 11.44%
B. .1144%
C. 1.82%
D. 0.0182%
E. 0.940%

47. 822 customers were randomly selected from those who had recently bought a book over the internet. The chart below shows the breakdown of the classification of the book type:
  
What percentages of books were in the top two categories? 
A. 22.99
B. 20.44
C. 4.50
D. 43.43
E. .4343

48. A graphical display of categorical data made up of vertical or horizontal bars is called a _____. 
A. Pie Chart
B. Pareto Chart
C. Bar Chart
D. Ogive Plot

49. A flaw possessed by a population or sample unit is _____. 
A. always random
B. a defect
C. displayed by a dot plot
D. the cause for extreme skewness to the right

50. A graphical portrayal of a data set that divides the data into classes and gives the frequency of each class is a(n) _____. 
A. Ogive Plot
B. Dot Plot
C. Histogram
D. Pareto Chart
E. Bar Chart