Statistics

Question 1

what will all null hypotheses state?

Answer 1

• there is no significant difference between means

OR

• correlation

OR

• difference between categoric data

Question 2

concluding using P values?

Answer 2

• statistical test value exceeds critical value
• reject/accept null hypothesis (usually reject)
• prob that X due to chance less than 5%
• difference between X/correlation = significant
• state hypothesis correct e.g. height does have an impact on weight

Question 3

describing stats tests?

Answer 3

• construct null hypothesis (if not already done)
• carry out stats test (say which one)
• use critical value table to show P less than or equal to 0.05 (less than 5% probability correlation due to chance)
• use critical value table figure to reject / accept null

Question 4

p is less then or equal to 0.05

Answer 4

• result significant
• reject null

Question 5

how do you calculate degrees of freedom?

Answer 5

number of categories minus 1

Question 6

how do you calculate expected values?

Answer 6

observed added together / categories