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

The following information was collected from a simple random sample of a population: 16, 19, 18, 17, 20, 18.  The point estimate of the mean of the population is _____.

The following equation was estimated from a sample of observed costs (C) and outputs (Q). C ^ = 3 . 75 + 0 . 35 Q   where Q = levels of output and C ^  = estimated cost ($). If Q=50, the predicted cost will be: 

The following gives you information about y (dependent variable) and x (independent variable). y x 12 4 3 6 7 2 6 4 You estimated regression equation of  y   ^ =   b 0   +   b 1 x . The least squares estimate of b0 equals:

In testing the hypotheses H 0 :   μ = 50 vs. H 1 :   μ ≠ 50 , the following information are known: n = 64, x = 53 . 5 , and   σ = 10. What is the value of the test statistic? [Formula: Test statistic for µ with σ known  z = x – μ σ n ]

The following information was collected from a simple random sample of a population: 16, 19, 18, 17, 20, 18.  The point estimate of the population standard deviation is _____.

Given the least squares regression line Y ^ = 2 . 48 – 1 . 63 X , and a coefficient of determination of 0.91, the coefficient of correlation is:

H0: μ ≤ 20, Ha: μ > 20, n = 36, sample mean (x bar) = 24.6, σ = 12, α=0.05 .    The null hypothesis should _____.

 In a two-tail test for the population mean, the null hypothesis will be rejected at α  level of significance if the value of the standardized test statistic z is such that:

H0: μ ≤ 50, Ha: μ >50, n = 49, sample mean= 54.8, s = 28, α =0.05.    The test statistic equals _____.