Inferential Statistic (RM P2)

Question 1

How to tell if the test is parametric

Answer 1

• Interval/ratio data
• Conforms to a normal distribution (no skewed distribution)
• Spread of data is not significantly large (small spread)

Question 2

Carrots Should Come, Mashed With Swede, Under Roast Potatoes

Answer 2

• Chi Squared
• Sign Test
• Chi Squared
• Mann Whitney
• Wilcoxon
• Spearmans
• Unrelated T-test
• Related T-test
• Pearsons

Question 3

When to use the Sign Test

Answer 3

• Nominal (non-parametric) data
• Checking for differences in data
• Repeated measures/matched pairs experimental design

Question 4

How to do the Sign Test

Answer 4

• Take away column A from column B
• If the answer is a positive number, put + next to it, if the answer is a negative number, put a - next to it, if there is no change, that data should be ignored
• Find out which symbol there is less of
• Count how many of that symbol there are: that is your calculated value of S
• Add up how many symbols there are overall: that is your N value
• Use the table to find the critical value of S through the level of significance and whether it is a one-tailed or two-tailed test