Question

the stem - and - leaf plot below gives the test scores for the 20 students in mrs. ya
test score
5|8 8
6|4 5
7|0 1 1 2 3 3 7 9
8|0 6 6 8
9|0 5 6 8
key: 5|8 means a score of 58.
(a) what was the lowest score in the 70s?
(b) how many students scored in the 60s?
(c) what was the highest score overall?

Explanation:

Step1: Identify scores in 70s

The scores in the 70s from the stem - and - leaf plot are 70, 71, 71, 72, 73, 73, 77, 79. The lowest among them is 70.

Step2: Count scores in 60s

The scores in the 60s are 64 and 65. So the number of students who scored in the 60s is 2.

Step3: Find highest overall score

Looking at all the scores in the plot: 58, 58, 64, 65, 70, 71, 71, 72, 73, 73, 77, 79, 80, 86, 86, 88, 90, 95, 96, 98. The highest score is 98.

Answer:

(a) 70
(b) 2
(c) 98