Term
| Why are Chi square tests performed? |
|
Definition
| to test an association between two categorical data or to compare proportions of independent groups |
|
|
Term
If independance of data is violated
(if one group shares 2 outcomes) which test would you do? |
|
Definition
|
|
Term
| If expected counts are less than 5 or if the sample is not large enough which test would you so? |
|
Definition
|
|
Term
| How would you calculate expected outcome for chi square? |
|
Definition
| E= (row sums)*(column sums)/ (total) |
|
|
Term
| how would you calculate deviation? |
|
Definition
O= observed count
deviation= (O-E) |
|
|
Term
| How would you calculate chi square? |
|
Definition
|
|
Term
| How would you calculate degree of freedom for chi square? |
|
Definition
| (number of rows-1)*(number of columns-1) |
|
|
Term
| How would you calculate Odds Ratio? |
|
Definition
|
|
Term
What does the confidence interval measure?
What does a narrow vs wide interval imply? |
|
Definition
1) degree of uncertainty
2) narrow = high precision
wide= low precision |
|
|
Term
| How do you calculate 95% confidence interval |
|
Definition
| 95% CI of OR = exp[Ln(OR) ± 1.96 × sq root (1/a + 1/b + 1/c + 1/d) |
|
|
