P value of Shapiro-Wilk test on TI-84

In previous installment, the Shapiro-Wilk test is performed step by step on the TI-84.

To calculate the p-value from this W statistic obtained, the following steps can also be done on the TI-84 using some standard statistics function. Note that the approximation below are for the case 4 ≤ n ≤ 11.

The mean and standard deviation are derived using the below equations.
shapiro84-pvalue1

The W statistic is assigned from the correlation calculation results, and another variable V is calculated for the transformed W.
shapiro84-pvalue2

Finally, the standardized Z statistic and p-value is calculated using the mean, standard deviation, and the transformed W value.
shapiro84-pvalue3 shapiro84-pvalue4

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One thought on “P value of Shapiro-Wilk test on TI-84

  1. Pingback: Performing Shapiro-Wilk test on TI-84 | gmgolem

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