Descriptive Statistics pt I

Question 1

What does descriptive statistics do?

Answer 1

It organizes and summarizes collected data

Question 2

Name two ways of summarizing data. Eg total

Answer 2

1. Graphs
2. use of numbers. i.e to calculate

Question 3

The way a set of data is measured is called ?

Answer 3

level of measurement

Question 4

What are the four main levels of measurement that data can be classified into? (from lowest to highest)

Answer 4

1. Nominal scale
2. Ordinal scale
3. Interval scale
4. Ratio scale

Question 5

What type of data is nominal data?

Answer 5

a type of qualitative data used to label variables without providing any quantitative value.

Question 6

What type of data is ordinal data?

Answer 6

Ordinal data is a kind of qualitative data that groups variables into ordered categories, which have a natural order or rank based on some hierarchal scale, like from high to low, hot to hottest

Question 7

What type of data is interval data?

Answer 7

Data measured along a numerical scale that has equal distances between adjacent values. These distances are called ‘intervals’.

Question 8

For interval data there is no true zero on an interval scale that represents total absence of variable. True or false?

Answer 8

True

Question 9

Because there’s no true zero, you can’t multiply or divide scores on interval scales. e.g. 30°C is not twice as hot as 15°C. (true or false)

Answer 9

True

Question 10

Define a ratio scale.

Answer 10

A quantitative scale with a true zero and equal intervals between neighbouring points.

Question 11

Give examples of a ratio scale.

Answer 11

1. Kelvin scale
2. Metre scale/rule