Inferential testing

Question 1

define statistical testing

Answer 1

a way to determine whether hypotheses should be rejected or accepted
if differences or relationhsips between variables are signficant or due to chance

Question 2

sign test

Answer 2

studies that:
* look for a difference not an association
* used related experimental design - repeated measures
* collected norminal data

1. find cacluated value for S (less frequent sign +/-)
2. find critical value of S
3. S<_ critical value = rejecte null hypothesis
4. S>_ accept the null hypothesis

Question 3

choosing inferential statisitical test

Answer 3

1. design of study - related or unrealted
2. level of data- ordinal norminal or interval
3. difference or correlation being measured

• look at photo of table

Question 4

define type I errors

Answer 4

incorrect rejection of a null hypothesis which is actually true
**false positive **

Question 5

define type II errors

Answer 5

failure to reject null hypothesis that is false
false negative

Question 6

define probability

Answer 6

calculation of how likely it is for an event to happen
5% / 0.05

Question 7

define significance

Answer 7

how sure we are about a correlation or differnce exisiting
if significant = reject null hypothesis and accept alternative hypothesis
“there is no difference”
“there is a difference”