Question

ms. lewis gave her students a biology test last week. here are the test scores for each of the fifteen students. test scores 92 85 97 80 83 80 79 91 90 93 95 81 89 80 80 (a) complete the grouped frequency distribution for the data. (note that the class width is 5.) test scores frequency 79 to 83 84 to 88 89 to 93 94 to 98 (b) construct a histogram for the data. frequency 8 7 6 5 4 3 2 1 0 79 to 83 84 to 88 89 to 93 94 to 98 test scores

Explanation:

Step1: Count scores in 79 - 83

Scores: 79, 80, 80, 80, 80, 81, 83. Count: 7.

Step2: Count scores in 84 - 88

Scores: 85. Count: 1.

Step3: Count scores in 89 - 93

Scores: 89, 90, 91, 92, 93. Count: 5.

Step4: Count scores in 94 - 98

Scores: 95, 97. Count: 2.

Answer:

For the grouped frequency distribution:

• 79 to 83: 7
• 84 to 88: 1
• 89 to 93: 5
• 94 to 98: 2

(For the histogram, the bars would have heights corresponding to these frequencies: 7 for 79 - 83, 1 for 84 - 88, 5 for 89 - 93, 2 for 94 - 98.)