CK-12-Basic Probability and Statistics Concepts - A Full Course

http://www.ck12.org Chapter 7. Organizing and Displaying Data

TABLE7.16:

Bin Frequency

[ 40 − 50 ) 0

[ 50 − 60 ) 9

[ 60 − 70 ) 5

[ 70 − 80 ) 6

[ 80 − 90 ) 3

[ 90 − 100 ) 1

Guided Practice

The following table is the the number of minutes spent practicing per day by a professional violinist for each of the
last 80 days:

86 67 105 122 98 83 84 101 100 120

93 99 78 101 92 89 95 102 110 100

84 77 82 107 88 93 94 103 127 111

120 100 105 95 99 91 103 79 89 84

112 96 107 106 85 92 105 91 90 104

89 114 106 99 101 81 92 88 100 97

78 103 86 107 101 98 77 69 89 90

98 102 94 103 80 99 109 101 93 86

Display the results in a histogram using technology and construct a frequency distribution table using a bin size of
10.

Answer:

First, press

STAT

, choose Edit on the EDIT menu, and enter the data values into L1. Since there are so many data values, it’s a good
idea to then use 1-Var Stats to find the minimum and the maximum data values so that the correct settings for the
histogram can be entered in the WINDOW screen. To access 1-Var Stats, after returning to the main screen, press

STAT

and choose 1-Var Stats on the CALC menu. After pressing

ENTER

to choose 1-Var Stats, press

ENTER

again, and then use the down arrow to find the minimum and maximum values. You should see the following: