Q. 2.11 - Elementary Statistics

Question

 Exam Scores. The exam scores for the students in an introductory statistics class are as follows.

88    82    89    70    85

63    100    86    67    39

90    96    76    34    81

64    75    84    89    96

a. Group these exam scores, using the classes 30-39,40-49,50-59, 60-69,70-79,80-89, and 90-100.

b. What are the widths of the classes?

c. If you wanted all the classes to have the same width, what classes would you use?

Step-by-Step Solution

Answer

Ans:  

Step 1. Given information.

given,

     

88    82    89    70    85

63    100    86    67    39

90    96    76    34    81

64    75    84    89    96

Step 2.