Question

the stem - and - leaf plot below gives the test scores for the 18 students in mr. jones’ math class. use the plot to answer the questions that follow. test score 6|7 7|0 2 3 4 8 9 8|0 1 3 4 4 5 5 7 9|4 4 5 key: 6|7 means a score of 67. (a) what was the highest score in the 80s? (b) what was the highest score overall? (c) how many students scored in the 70s?

Explanation:

Step1: Identify scores in 80 - 89 range

In the stem - and - leaf plot, for the 80s, the scores are 80, 81, 83, 84, 84, 85, 85, 87. The highest score in the 80s is 87.

Step2: Identify all scores

The scores from the stem - and - leaf plot are: 67, 69, 70, 72, 73, 74, 78, 80, 81, 83, 84, 84, 85, 85, 87, 94, 94, 95. The highest overall score is 95.

Step3: Count scores in 70 - 79 range

The scores in the 70s are 70, 72, 73, 74, 78. There are 5 students who scored in the 70s.

Answer:

(a) 87
(b) 95
(c) 5