Analysis And Intepretation Of Quantitative Data

Question 1

What are the 3 Measure of central tendency

Answer 1

Mean
Median
Mode

Question 2

What is a mean

Answer 2

Add all scores up and divide by number of scores

Question 3

Evaluation of a mean

Answer 3

Takes into account all data
Most sensitive measure
Affected by extreme values

Question 4

What is a median
Common question

Answer 4

Scores all put in numerical order
Middle one is take as medium
If two middle scores they are added together and divided by two

Question 5

Evaluation of the median

Answer 5

Much less effected by extreme scores
Easy to calculate
Less sensitive as not all scores taken into account

Question 6

What is the mode

Answer 6

Most common number

Question 7

What happens if there is more than one mode

Answer 7

It is bi-modal

Question 8

What happens if all the scores are different what is the mode

Answer 8

There is no mode

Question 9

Evaluation of a mode

Answer 9

Easy to work out
Not very sensitive
May be several modes in a set of data

Question 10

What is a range

Answer 10

Difference between the lowest and highest score in a data set

Question 11

Evaluation of a range

Answer 11

Easy to calculate
Takes highest and lowest score into account
But can be affected by outliers

Question 12

What is standard deviation

Answer 12

Measure the spread of scores around a mean
Know how draw bell curve/normal curve

Question 13

Evaluation of standard deviation

Answer 13

Most precise measure
Most sensitive measure
Can be effected by extreme value as the mean is distorted