The appropriate test for a comparison a group of 10 dogs and group of 10 cats people is:

z-test

paired-samples t-test

one-sample t-test

independent-samples t-test

When the degrees of freedom are large (high), smaller t-ratios are required to reject null.

TRUE OR FALSE?

Which option fits type II error the best?

Probability of correctly rejecting the null hypothesis

"Probability of having a successful study"

"Probability of rejectingthe null, if the null is false."

"Probability of retaining the null, when the null is false"

"Probability of rejecting the null, if the null is true"