Question

If a sample size is 20, which can be used to test a hypothesis about the mean?

Answer 1

The degrees of freedom can be used to test a hypothesis about the mean.

What is degrees of freedom?

Degrees of freedom refers to the maximum number of logically independent values that have the freedom to vary, in the data sample.

Given, the sample size is 20, then degree of freedom will be

The degrees of freedom represented as

dof = n – 1

dof = 20 – 1

dof = 19

Thus, the degrees of freedom can be used to test a hypothesis about the mean.

Learn more about degrees of freedom.

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Answer 2

Answer:

What is the degrees of freedom when the sample size is 20?

19

For example, if we have a sample of size n = 20 items, then we calculate the degrees of freedom as df = n – 1 = 20 – 1 = 19 and we write the distribution as T ~ t19.

Explanation: