You are thinking of conducting a one-sample t test about a population mean m using a 0.05 significance level. Which of the following statements is correct?

(a) You should not carry out the test if the sample does not have a Normal distribution.

(b) You can safely carry out the test if there are no outliers, regardless of the sample size.

(c) You can carry out the test if a graph of the data shows no strong skewness, regardless of the sample size.

(d) You can carry out the test only if the population standard deviation is known.

(e) You can safely carry out the test if your sample size is at least 30.