A claim or conjecture

It is a proposed/tentative statement,

assertion, or assumption about a

population parameter or about the

distribution of a random variable.

It is the systematic process of gathering

evidences to either support or reject a claim or conjecture

(hypothesis)

A statement saying

that there is no

significant

difference between

two parameters.

and it is the hypothesis

to be tested.

A statement saying that

there is a significant

difference between two

parameters and it is a statement that

will be true once the null

hypothesis is rejected.

It is a hypothesis test where the

rejection region lies at only one tail of

the distribution. This test is used when

the alternative hypothesis is

directional.

It means that the value of the

measures is either greater than (>) or

less than (<) the other measure.

This is classified as left-tailed or right-

tailed test

This is a hypothesis test where the

rejection region lies on both end tails of

the distribution, one on the left and one

on the right.

It is used when the alternative hypothesis

is non-directional, which means that the

values of two measures of the same kind

is not equal.

It has not equal sign (≠)

in the alternative hypothesis.