Data

Question 1

4 types of data

Answer 1

Primary
Secondary
Measure of central tendency
Measures of deviation

Question 2

Primary data

Answer 2

FIRST HAND
Directly collected by researcher for THAT study.

Question 3

Secondary data

Answer 3

SECOND HAND
Data originally collected for another purpose other than the current one.

Question 4

Measures of central tendency

Answer 4

Mean
Mode
Range

Question 5

Advantage of mean

Answer 5

•Uses all the data available
•Can be used in many calculations.

Question 6

Disadvantage of mean

Answer 6

can be skewed by extremely high or low scores which could make it misleading
can be unrealistically precise

Question 7

Advantage of median

Answer 7

relatively quick and easy
It’s not affected by extieme scores,

Question 8

Disadvantage of median

Answer 8

. Not all of the scores are used.
•It has little further use in data analysis.
•It does not work well with small data sets.

Question 9

Advantage of mode

Answer 9

*It shows the most common. important score.

Question 10

Disadvantage of mode

Answer 10

Little further use in data analysis

Question 11

Advantage to range

Answer 11

•Easy to calculate
•Takes account of extreme values

Question 12

Disadvantage to range

Answer 12

•It ignores all but 2 of the scores, so is unlikely to provide an adequate measure of the general spread of data

Question 13

Advantage to standard deviation

Answer 13

*A more precise measure of dispersion because it takes account into all of scores

Question 14

Disadvantage to standard deviation

Answer 14

•Harder to work out
•May hide some of the characteristics of the data set (e.g. extreme values )

Question 15

2 measures of dispersion

Answer 15

Range
Standard deviation