10

The following graph is a histogram representing the weight of 100 children:

Histogram

1. Create the respective table of distribution.

2. If John weighs 72 pounds, how many students are lighter than he is?

3. Calculate the mode.

4. Calculate the median.

5. In what quartile are 25% of the heaviest pupils found?


1

  xi fi Fi
[60,63) 61.5 5 5
[63, 66) 64.5 18 23
[66, 69) 67.5 42 65
[69, 72) 70.5 27 92
[72, 75) 73.5 8 100
    100  

2

5 + 18 + 42 + 27 = 92 students lighter than Andrew.

Mode

Statistical Operations

Median

Statistical Operations

5

25% of the heaviest students are found in the third quartile.

Statistical Operations