Data Analysis

Question 1

2). Inferential statistics

Answer 1

Tell us the likelihood that differences are due to chance or not

Question 2

Measure of central tendency

Answer 2

(Averages)mean, medium or mode

Gives typical value for data set

Question 3

1). Descriptive statistics

Answer 3

Give us a general description of results ie averages and ranges

Describes differences between conditions

Question 4

Measure of dispersion

Answer 4

Range , standard deviation

Indicates how the data are spread out

Tells you what the rest of the data is doing

Question 5

Mean (best)

Answer 5

+ tog and divide by total

✅ it uses all values in the set, most sensitive to variation in the data

❎ can be artificially raised or lowered by an extreme value or skewed data( don’t use if outlier )

Question 6

Medium

Answer 6

In order, find middle, if even + tog divide 2

✅ based on order of data not actual values
✅ not distorted by extreme values

❎ less sensitive to variations in the data

Question 7

Mode ( worst)

Answer 7

Most frequent

✅ only measure suitable for summarising category/ frequency data

❎ some data there is no modal value or more than one

Question 8

2 modes

Answer 8

Bimodal

Question 9

More than 2 modes

Answer 9

Multi model

Question 10

Dispersion

Answer 10

How the rest of the data relate to the central tendency and how spread out scores are

Question 11

Range

Answer 11

Biggest - the smallest

✅ easy to calculate

❎ very easily swayed by outliers

Question 12

Standard deviation

Answer 12

How far from the mean each score is

✅ all data is used more representative measure

❎ long time to calculate

Question 13

Standard of acceptance

Answer 13

5% (0.05)

Anything less than this is significant and it is unlikely that the null hypothesis is true

Question 14

More certain results

Answer 14

1% (0.01)