# Univariate Data Powerpoint

```QUICK QUIZ!
1.
2.
3.
4.
5.
What are the two main types of data?
Categorical data can either be ordered or not. Which
two words describe this?
Give an example of numerical continuous data.
Bar charts are different to histograms. Describe one
difference.
What are class intervals and why are they sometimes
necessary?
Complete Worksheet
General Mathematics Commencement Holiday HW
1. Classify the following situations as categorical or numerical:
a) A group of people write down their favourite colour
________________
b) Each student in a class is weighed in kilograms
________________
c) Each student in a class is weighed and then classified as “light”, “average” or “heavy”
________________
2. The following responses were received to a question regarding the return of capital punishment.
a) Complete the table below.
b) How many people said “Strongly Agree”?
___
c) What percentage of people said “Strongly Disagree”? ___
d) What was the most frequent response? ___
e) Construct a bar chart of the frequencies in the field
on the right.
Attitude to capital
punishment
Strongly Agree
Agree
Don’t Know
Disagree
Strongly Disagree
Total
Frequency
Count Percent
21
8.2
11
4.3
42
129
256
50.4
100.
3. A group of 28 students were asked to draw a line that they estimated to be the same length as a 30cm ruler.
The results are shown in the frequency table below.
a) How many students drew a line with a length of:
i) from 29.0 to 29.9cm? ___
ii) less than 30 cm?
___
b) What percentage of students drew a line with a length of:
i) from 31.0 to 31.9 cm?
___
ii) less than 31cm?
___
c) Use the table to construct a histogram using the counts.
Length of line
(cm)
28.0 – 28.9
29.0 – 29.9
30.0 – 30.9
31.0 – 31.9
32.0 – 32.9
33.0 – 33.9
Total
Frequency
Count
Percent
1
3.6
2
7.1
8
28.6
9
32.1
7
25.0
1
3.6
28
100.0
```