Author: Anonymous

Blood glucose levels are controlled by which of the following?

Using BMI is an accurate way to measure body fat percentage.

The cork cambium (phellogen) produces

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

Consider a simple random sample of 50 items from an infinite population with σ = 6 resulted in a sample mean of 32. Historical data show that the population follows normal distribution. The 99% confidence interval for the population mean is:

figure 1(4).pngThe critical F value for the above hypothesis is

figure 1(1).png  The mean square error is

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 ]

figure 1(1).png  The t statistic for the above hypothesis test is

The manager of a grocery store has taken a random sample of 100 customers. The average length of time it took the customers in the sample to check out was 3.1 minutes. The population standard deviation is known to be 0.5 minute. We want to test to determine whether or not the mean waiting time of all customers is significantly more than 3 minutes. At a .05 level of significance, it can be concluded that the mean of the population is