Question

mr. cox gave his students a biology test last week. here are the test scores for each of the fifteen students. (a) complete the grouped frequency distribution for the data. (note that the class width is 5.) (b) construct a histogram for the data.

Explanation:

Step1: Count the number of scores in the range 79 - 83

The scores in the range 79 - 83 are 79, 80, 80, 80, 80, 83. So the frequency is 6.

Step2: Count the number of scores in the range 84 - 88

The scores in the range 84 - 88 is 85. So the frequency is 1.

Step3: Count the number of scores in the range 89 - 93

The scores in the range 89 - 93 are 93, 92, 91, 89, 90. So the frequency is 5.

Step4: Count the number of scores in the range 94 - 98

The scores in the range 94 - 98 are 95, 97. So the frequency is 2.

Answer:

Test scores	Frequency
84 - 88	1
89 - 93	5
94 - 98	2