Q4. A random sample of size n= 81 is taken from an infinite population with mean u = 128 and the standard deviation o = 6.3. With what probability we can assert that the value of X will not fall...

Extracted text: Q4. A random sample of size n= 81 is taken from an infinite population with mean u = 128 and the standard deviation o = 6.3. With what probability we can assert that the value of X will not fall between 126.6 and 129.4 if we use (a) Chebyshev's theorem, (b) The Central Limit Theorem