From a sample of 400 items, 14 are found to be defective. Th…

From a sample of 400 items, 14 are found to be defective. The point estimate of the population proportion defective will be: [Formula: Sampling distribution of the sample proportion  p ^ = x n         E ( P ^ ) = p         σ p ^ = p ( 1 – p ) n         z = p ^ – p p ( 1 – p ) n

A random sample of size 36 is taken from a population with μ…

A random sample of size 36 is taken from a population with μ = 120 and σ = 39. The mean and standard error of the sampling distribution of the sample mean, respectively, are: [Formula:  Sampling distribution of the sample mean  E ( x ) = μ x           σ x = σ x n         z = x – μ σ n ]