1/0 Chapter Three
In the following multiple choice questions, circle the correct answer. An answer key is
provided following the questions.
1. A numerical value used as a summary measure for a population of data is called a
The study of efficient utilization or management of limited productive resources which purpose is to attain maximum satisfaction from human material wants A limited amount of available resources to fulfill the unlimited wants Comparing mar
1.A population has a standard deviation of 16. If a sample of size 64 is selected from this population, what is the probability that the sample mean will be within 2 of the population mean? a. 0.3413 b. Since the mean is not given, there is no answer
Add all the numbers and divide them by the number of items to get the
Take the sample mean and subtract from the population mean
Z= average mean- population mean/ standard deviation/ Square root of sample size
Adjusted R Square
5 R 14200 14200 74.2
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
1) For some positive value of X, the probability that a standard normal variable is between 0 and
+.5X is 0.4332. What is the val
Exam 1 Study Guide
Center of Data?
Mean = average of the data
Median = middle of the data
Mode = what number occurs most frequently?
n= population size
Xi= ith individual value of variable x.
Easy way: Add up all va
1. From a population with a variance of 900, a sample of 225 items is selected. At 95% confidence, the margin of error is a. 2 b. 15 >c. 3.92 d. 4 2. In order to determine an interval for the mean of a population with unknown standard deviation a sam
1 Chapter 1: Course Introduction
We are interested to learn some information about a particular group, but we cannot
possibly get to all of them.
Definition. The population is the set of all objects or individuals of interest or their measurements. (usual