Given the test scores:
100, 93, 78, 93, 99,87, 91, 73, 90, 80, 70, 100, 68, 83, 92, 76, 88, 91, 100, 85, 72, 93, 76, 81, 67, 83
Let's construct the following:
• (a). Test scores Frequency Table.
First arrange the scores from the least to the greatest.
67, 68, 70, 72, 73, 76, 76, 78, 80, 81, 83, 83, 85, 87, 88, 90, 91, 91, 92, 93, 93, 93, 99, 100, 100, 100
Now, we have the following:
67 ==> occurred once
68 ==> Occurred once
70 ==> occurred once
72 ==> Once
73 ==> Once
76 ==> Twice
78 ==> Once
80 ==> Once
81 ==> once
83 ==> twice
85 ==> Once
87 ==> Once
88 ==> Once
90 ==> Once
91 ==> Twice
92 ==> Once
93 ==> 3 times
99 ==> Once
100 ==> 3 times.
Now, to construct the frequency table, we have:
• (b). Test scores Frequency Histogram.
Let's make the histogram using intervals.
Intervals:
Numbers from 61 - 70 ==> 3 times
Numbers from 71 - 80 ==> 6 times
Numbers from 81 - 90 ==> 7 times
Numbers from 91 - 100 ==> 10 times
We have the histogram below: