L14 -ANOVA

Question 1

What are the three types of T- tests?

Answer 1

Single sample, independent samples, and paired t test

Question 2

What is type 1 error?

Answer 2

Rejecting the null hypothesis when it is actually true
(false positive)

Question 3

What is an AVOVA test?

Answer 3

It allows us to investigate whether the variability is statistically significant

It measures the variation within the groups and compares it to the variation between groups

Question 4

what are the assumptions in a one way ANOVA test?

Answer 4

1. Independence: each group is compared as an independent random sample
2. Normality: The samples are drawn from a population that is normally distributed.
3. Homogeneity: the samples come from a population that has equal variance.

Question 5

In an ANOVA test what is the Null Hypothesis

Answer 5

Ho: all the population means are equal.

Question 6

what does the Post Hoc test do?

Answer 6

after an ANOVA test is done, and there is a statistically significant difference. A Post Hoc test can be done to determine which group means significantly differ from one another.