This statlet tests hypotheses about the mean and standard deviation of a normal distribution. Sample size - the number of observations in the sample.
Sample mean - the mean of the sample.
Sample standard deviation - the standard deviation of the sample. A confidence interval for the mean. The result of a t-test run to test a hypothesis about the population mean. Use the Options button to specify the hypotheses to be tested. If the P-value is less than the alpha risk which you specify, you should reject the null hypothesis at the corresponding significance level.