Question

hernandez gave his students a biology test last week. here are the test scores for each of the eighteen students. test scores: 76 69 84 73 88 84 75 80 68 88 85 70 77 72 86 80 87 69 (a) complete the grouped frequency distribution for the data. (note that the class width is 6.) test scores frequency 66 to 71 72 to 77 78 to 83 (b) construct a histogram for the

Explanation:

Step1: Count scores in 66 - 71

Count scores 69, 68, 70, 69 in the range 66 - 71. There are 4 scores.

Step2: Count scores in 72 - 77

Count scores 76, 73, 75, 77, 72 in the range 72 - 77. There are 5 scores.

Step3: Count scores in 78 - 83

Count scores 80, 84, 84, 80 in the range 78 - 83. There are 4 scores.

Answer:

Test scores	Frequency
72 to 77	5
78 to 83	4