chapter 1

Question 1

Sample

Answer 1

A selection from the whole population

Question 2

Primary Data

Answer 2

Data which is collected for a specific investigation

Question 3

Standard Deviation

Answer 3

Square root of variance

Question 4

Qualitative Data

Answer 4

Data which can be organised into categories but cannot be given a numerical value

Question 5

Lower Quartile

Answer 5

The item one quarter of the way through when the data are put in order

Question 6

Continuous data

Answer 6

Data which can be measured and which can take any value within a certain range

Question 7

Discrete data

Answer 7

Data which can have only certain definite values

Question 8

Mode

Answer 8

The most common

Question 9

Median

Answer 9

The middle item when the data are in order

Question 10

Secondary data

Answer 10

Data which is already published and which may be accessed for many investigations

Question 11

Quantitative data

Answer 11

Data which can be measured or which has an exact numerical value

Question 12

Interquartile Range

Answer 12

Upper quartile - Lower quartile

Question 13

Upper quartile

Answer 13

The item three quarters of the way through when the data are put in order

Question 14

Standard deviation

Answer 14

Tells us how much the data spread out around the mean

Question 15

Mean

Answer 15

A measure of the average which uses all the data values

Question 16

Range

Answer 16

The difference between the largest and smallest data values

Question 17

Population

Answer 17

The whole group that we are interested in

Question 18

Interquartlie range

Answer 18

Tells us the spread of the middle 50% of the data values