One Tailed vs Two Tailed Student's t-test

Question 1

What are the two different ways that we can conduct a student’s t-test?

Answer 1

One Tailed Test and Two Tailed Test

Question 2

What is One Tailed Test?

Answer 2

testing for the probability of the relationship in one direction

Question 3

What does the One Tailed Test test for?

Answer 3

if the mean of data set ‘A’ is greater than the data set of ‘B’ OR if it is significantly less

Question 4

What can’t One Tailed Test tell us?

Answer 4

it can’t tell us both at the same time whether it is greater or lesser than set B

Question 5

What is the Two Tailed Test?

Answer 5

it tests for the probability of the relationship in both directions

Question 6

What would the null hypothesis for the Two Tailed Test be?

Answer 6

it would be that the mean of set A is the same as the mean of set B

Question 7

What does the Two Tailed Test test to see?

Answer 7

if the mean of A is significantly greater or less than the mean of B

Question 8

What is the mean of the Two Tailed Test considered?

Answer 8

the mean is considered statistically significantly different if the test statistic is in the top 2.5% or the bottom 2.5% of the probability distribution

Question 9

What is the Paired t-test?

Answer 9

it compares data from the same source e.g. Joe Day 1 and Joe Day 2

Question 10

What is the Unpaired t-test?

Answer 10

this compares data from two different sources e.g. Joe Day 1 vs Kate Day 1