Question

A frequency table recording the heights of 50 children is shown below. How can I construct a histogram to represent the data recorded and What percentage of the children were less than 149.5 cm in height?

Answer 1

To make a histogram:

1. Draw and label x and y axis:

x-axis is label in the given situation as height

y-axis is label as frequency

2. Divide the y-axis into 5 parts (each part is 4 units)

Divide the x-axis into the given heights (7 class)

3. Graph the frequency of each class:

What percentage of the children were less than 149.5 cm in height?

- The 100% of the data is 50 children, from that there are 41 children less than 149.5cm in height; use a rule of three to find the corresponding percentage:

`x=(41*100)/(50)=(4100)/(50)=82`

Then, the 82% of the children were less than 149.5 cm in height