Question

dot plot worksheet
name

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.

(image of dot plot with 0:3 dots, 1:3 dots, 2:3 dots, 3:6 dots, 4:4 dots, 5:0 dots, 6:1 dot)
a. how many of the students have six siblings?
b. how many of the students have no siblings?
c. how many of the students have three or more siblings?

1. the resting pulse rates were recorded for 16 boys in gym class before they exercised. the line plot here shows the results.

(image of line plot with 79:2 xs, 80:4 xs, 81:1 x, 82:3 xs, 83:4 xs, 84:0 xs, 85:2 xs)
a. what is the range of the pulse rates?
b. how many boys had a pulse rate over 81?
c. how many boys had a pulse rate of 83?

Explanation:

1a. Step1: Check dot at 6

Count dots above 6. There's 1 dot.

1b. Step1: Check dot at 0

Count dots above 0. There are 3 dots.

1c. Step1: Count dots for 3,4,5,6

Dots at 3: 5, at 4: 4, at 5: 0, at 6: 1. Sum: \(5 + 4 + 0 + 1 = 10\).

2a. Step1: Find max and min

Max pulse rate: 85, Min: 79. Range = \(85 - 79 = 6\).

2b. Step1: Count dots over 81 (82,83,84,85)

Dots at 82: 3, 83: 4, 84: 0, 85: 2. Sum: \(3 + 4 + 0 + 2 = 9\).

2c. Step1: Check dot at 83

Count dots above 83. There are 4 dots.

Answer:

1a. 1
1b. 3
1c. 10
2a. 6
2b. 9
2c. 4