Module 8: T-Tests

Question 1

Single sample t-tests use

Answer 1

-designed to evaluate whether the mean of your sample is different from a reference value

Question 2

Single sample t-tests null and alternative

Answer 2

-Ho: m = u
-Ha: m=/ u
-m is for sample mean
-u is for reference value

Question 3

Single sample null distribution shape

Answer 3

-t-distribution

Question 4

Single sample reporting

Answer 4

-sample mean, SD
-observed t score (2 decimal places)
-degrees of freedom
-p value (5 decimal places)

Question 5

Paired sample t tests use

Answer 5

-how sampling units change across a factor
-2 measurements taken from each sampling unit, over time or from 2 locations

Question 6

Paired sample t test null and alternative

Answer 6

-Ho: d = u
-Ha: d =/ u
-d is for difference
-u is for reference value (often 0)

Question 7

Paired sample null distribution shape

Answer 7

-t distribution

Question 8

Paired sample reporting

Answer 8

-mean difference, SD
-observed t score (2 decimal places)
-degrees of freedom
-p value (5 decimal places)

Question 9

Two sample t test use

Answer 9

-evaluate whether the mean of one group is different from mean of another group

Question 10

Two sample t test null and alternative

Answer 10

-Ho: m1 =m2
-Ha: m1 =/ m2
-m1 is for mean 1
m2 is for mean 2

Question 11

Two sample null distribution shape

Answer 11

-t-distribution

Question 12

Two sample reporting

Answer 12

-mean, SD, and sample size for each group
-T-score (2 decimal places)
-degrees of freedom
-p value (5 decimal places)