2021 paper mistakes

Question 1

Answer 1

-1.0

Question 2

What level of data and type of design are required to use the Mann-Whitney U test?

Answer 2

ordinal data with independent measures design

Question 3

Answer 3

interval data can be treated as ordinal data for analysis

Question 4

Answer 4

14

Question 5

Outline one strength of using the standard deviation rather than the variance as the measure of dispersion for the data collected in this study.

Answer 5

The standard deviation is the square root of the variance. The advantage of this is that the answer is a figure that is much more typical of the actual difference (actual data collected)

Question 6

Using the Wilcoxon T Signed Ranks test, calculate the value of T. Formula / process for calculating T: T = the sum of differences of the ranks with the least frequent sign

Answer 6

Question 7

The Wilcoxon T Signed Ranks test was used as the data was considered not to be parametric. Identify two of the criteria for using a parametric test to analyse data.

Answer 7

Answers could include:
* Population/scores normally distributed ( 68% of our data should be less than ±1 standard deviation around the mean)
* At least interval/ratio (continuous) data
* No extreme scores