- (t-test-one-sample x-bar sd n mu #:tails)procedure
Given observed data with mean x-bar, standard devation sd and number of observations n (n < 30), return the significance of the sample compared with the population mean mu. #:tails is one of:
- ':both two-sided (default)
- ':positive one-sided, x-bar >= mu
- ':negative one-sided, x-bar <= mu