## Frequency Exercise

1. The following set of data shows the number of cans of baked beans sold by a supermarket each day for three weeks:

15, 13, 16, 10, 20, 15, 16, 10, 13, 13, 14, 15, 16, 11, 14, 16, 19, 18, 15, 17, 16

Complete the frequency table below to summarise these numbers and find the mean number of cans sold.

 Number of cans (x) frequency (f) f . x 10 11 12 13 14 15 16 17 18 19 20 Total

2. The following frequency table shows the results of a survey to find the number of cars owned by each household in a small town.

 Number of cars Frequency (f) 0 87 1 324 2 158 3 23 4 5

a. Draw a bar graph to show this data.

b. How many households were surveyed?

c. Find the mean, median and mode.

3

The heights of a squad of 20 netball players are shown below:

183, 178, 169, 189, 190, 158, 168, 159, 178, 182

164, 174, 183, 182, 194, 199, 193, 197, 194, 178

a. Complete the grouped frequency table below:

 Height (cm) Frequency (f) 151 − 160 161 − 170 171 − 180 181 − 190 191 − 200

b. Sketch a histogram to show these heights.

c. Sketch a frequency polygon of the data.

d. What is the modal class or interval? 