The t-test can be conducted if the sample size n = 50.

The z-test cannot be conducted if the sample size is n = 30.

The null hypothesis is a statement which asserts that there is no difference between a parameter and a specific value.

If we accept the null hypothesis, we should also accept the alternative hypothesis.

The mean of the sampling distribution is the point estimate of the population mean.

We get the level of significance by subtracting the confidence level from 1.

We can still use the z-test even if there is no population standard deviation.

We can use the z-table for the t-test.

The higher the confidence level, the lower your sample size.