1. the students in one social studies class were asked how many brothers and sisters (siblings) they each…
1. the students in one social studies class were asked how many brothers and sisters (siblings) they each have. the dot - plot here shows the results.\na. how many of the students have six siblings?\nb. how many of the students have no siblings?\nc. how many of the students have three or more siblings?\n2. the resting pulse rates were recorded for 16 boys in gym class before they exercised. the line plot here shows the results.\na. what is the range of the pulse rates?\nb. how many boys had a pulse rate over 82?\nc. how many boys had a pulse rate of 83?
Answer
Explanation:
Step1: Count dots for 6 siblings
Count the number of dots above 6 on the first dot - plot. There is 1 dot.
Step2: Count dots for 0 siblings
Count the number of dots above 0 on the first dot - plot. There are 3 dots.
Step3: Count dots for 3 or more siblings
Count the dots above 3 (including 3) on the first dot - plot. There are 5 + 3+1 = 9 dots.
Step4: Find range of pulse - rates
For the second line - plot, the range is calculated as the maximum value minus the minimum value. The maximum value is 85 and the minimum value is 79. So the range is 85 - 79 = 6.
Step5: Count boys with pulse rate over 82
Count the number of 'X's for values 83, 84, and 85 on the second line - plot. There are 4 + 0+2 = 6 'X's.
Step6: Count boys with pulse rate of 83
Count the number of 'X's above 83 on the second line - plot. There are 4 'X's.
Answer:
a. 1 b. 3 c. 9 2. a. 6 b. 6 c. 4