Statistical Tests and Analysis Flashcards
1
Q
What does a Null Hypothesis assume?
A
That there is no significance difference in the results
2
Q
A test you would use to investigate a correlation of data
A
Correlation Coefficient (e.g. Spearman Rank)
3
Q
A test you would use to compare observed and expected frequencies for data group into categories
A
Chi-squared
4
Q
A test you would use to compare the difference between two means of tow or more sets of data
A
T-test
5
Q
If the test statistic is greater than or equal to the critical value then…
A
- The difference/correlation IS SIGNIFICANT
- There is LESS THAN 5% probability that the results are due to chance
- The Null Hypothesis would be REJECTED
6
Q
If the test statistic is lower than the critical value then…
A
- The difference/correlation IS NOT SIGNIFICANT
- There is MORE THAN 5% probability that the results were due to chance
- The Null Hypothesis is ACCEPTED
7
Q
Degree of freedom to use for a Chi-Squared test is calculated by…
A
the number of categories - 1
8
Q
Degree of freedom to use for a T-test is calculated by…
A
n1 + n2 - 2
