Question Details

31. If there are 30 values in a data set, how many classes should be created for a frequency histogram? 
A. 4
B. 5
C. 6
D. 7
E. 8

32. A CFO is looking at how much of a company's resources are spent on computing. He samples companies in the pharmaceutical industry and developed the following stem-and-leaf graph.
  
What is the approximate shape of the distribution of the data? 
A. Normal
B. Skewed to the right
C. Skewed to the left
D. Bimodal
E. Uniform

33. A CFO is looking at how much of a company's resources are spent on computing. He samples companies in the pharmaceutical industry and developed the following stem-and-leaf graph.
  
What is the smallest percent spent on R&D? 
A. 5.9
B. 5.6
C. 5.2
D. 5.02
E. 50.2

34. A CFO is looking at how much of a company's resources are spent on computing. He samples companies in the pharmaceutical industry and developed the following stem-and-leaf graph.
  
If a frequency histogram were to be created using these data, how many classes would you create? 
A. 4
B. 5
C. 6
D. 7
E. 8

35. A CFO is looking at how much of a company's resources are spent on computing. He samples companies in the pharmaceutical industry and developed the following stem-and-leaf graph.
  
What would be the class length that would be used in creating a frequency histogram? 
A. 1.4
B. 8.3
C. 1.2
D. 1.7
E. 0.9

36. A CFO is looking at how much of a company's resources are spent on computing. He samples companies in the pharmaceutical industry and developed the following stem-and-leaf graph.
  
What would be the first class interval for the frequency histogram? 
A. 5.2 - 6.5
B. 5.2 - 6.0
C. 5.0 - 6.0
D. 5.2 - 6.6
E. 5.2 - 6.4

37. The US local airport keeps track of the percentage of flights arriving within 15 minutes of their scheduled arrivals. The stem-and-leaf plot of the data for one year is below:
  
How many flights were used in this plot? 
A. 7
B. 9
C. 10
D. 11
E. 12

38. The US local airport keeps track of the percentage of flights arriving within 15 minutes of their scheduled arrivals. The stem-and-leaf plot of the data for one year is below:
  
In developing a histogram of these data, how many classes would be used? 
A. 4
B. 5
C. 6
D. 7
E. 8

39. The US local airport keeps track of the percentage of flights arriving within 15 minutes of their scheduled arrivals. The stem-and-leaf plot of the data for one year is below:
  
What would be the class length for creating the frequency histogram? 
A. 1.4
B. 0.8
C. 2.7
D. 1.7
E. 2.3

40. A company collected the ages from a random sample of its middle managers with the resulting frequency distribution shown below:
  
What would be the approximate shape of the relative frequency histogram? 
A. Symmetrical
B. Uniform
C. Multiple peak
D. Skewed to the left
E. Skewed to the right