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?