Comparing Normal and T-distributions
Module overlays the t-distribution on top of the normal distribution showing convergence as the degrees of freedom increases. Z scores and T-scores for alpha/2 tail probabilities are calculated and plotted for both the normal distribution and the t-distribution allowing students to visually understand the difference in confidence interval size when using the normal or the t-distribution as well as convergence between the two for larger sample sizes. User specifies degrees of freedom, alpha/2 tail probabilities, and the plot range. Ordinate scale and plot values are automatically scaled and calculated on the fly in accordance with user specified inputs.