Hypothesis testing

Question 1

What do we assume when carrying out a statistical test?

Answer 1

Independence of data within and between groups

Question 2

What is the term given to the violation of independence of data?

Answer 2

Pseudo-Replication (is evil!)

Question 3

What are the two types of Hypothesises?

Answer 3

• Null hypothesis (the one we assume less likely to be true)

- Alternative hypothesis (the one we assume more likely to be true)

Question 4

What are some of the ways we can reject Ho?

Answer 4

• P-values smaller than the alpha level the test is conducted at
• Large T-test values

Question 5

What is a type 1 error?

Answer 5

rejecting Ho when it is in fact true

Question 6

What is a type 2 error?

Answer 6

Not rejecting Ho when it should be rejected

Question 7

What is the Bonferroni correction and how is it done?

Answer 7

The Bonferroni correction is used when using multiple testing methods
- we divide the alpha level by the number of comparisons of groups (k)

Question 8

Describe the 7 step process of hypothesis testing

Answer 8

• State Ho and H1
• Chose a statistical test
• Select an alpha level to test at
• Complete a sampling distribution
• Find the P-value
• Decide to reject Ho or not
• Interpret the decision in the context of the data