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:
a. Complete the grouped frequency table below:
b. Sketch a histogram to show these heights. c. Sketch a frequency polygon of the data. d. What is the modal class or interval? |