Answer
22.463.
Work Step by Step
k=35, z=-1.645, hence using the given formula: $X^2=k(1-\frac{2}{9k}+z\sqrt{\frac{2}{9k}})^3=35(1-\frac{2}{9\cdot35}-1.645\sqrt{\frac{2}{9\cdot35}})^3=22.463.$ Hence we can see that this value is really close to the value we got by using STATDISK and Minitab, even closer than the value we got in the previous exercise.
