Software utility programs. The Internet has many free applets that can determine exact probabilities for t-random variables.f You can also use WinPepig WhatIs.exe or Microsoft Excel’s TDIST function for this purpose. Use one of these software applications to find:

(a) Pr(T8

≥ 2.65)

(b) Pr(T8

≥ 2.98)

(c) Pr(T19

≤ 2.98)