1. Using the frequency distribution in Exercise 2.5, identify the following for the 15-under 25 class:
(a) frequency, (b) upper and lower limits, (c) width, and (d) midpoint.
Construct a frequency distribution and a histogram for these data.
2. The following performance scores have been recorded for 25 job applicants who have taken a pre- employment aptitude test administered by the company to which they applied:
|
66.6
|
75.4
|
66.7
|
59.2
|
78.5
|
80.8
|
79.9 87.0 94.1
|
|
70.2
|
92.8
|
86.9
|
92.8
|
66.8
|
65.3
|
100.8 76.2 87.8
|
71.0 92.9 97.3 82.5 78.5 72.0 76.2
Construct a frequency distribution and a histogram for these data.