There are 2 pages in this exam: Page: 1 2 1. Question:
(TCO 6) In the standard normal distribution, the standard deviation is always Your Answer: 0 1 ( Ch 5: By definition, the standard deviation = 1. ) CORRECT 2 none of these Points Received: 5 of 5 2. Q
Math 221 - Statistics
Practice Quiz
Week 2
This quiz review covers materials from Weeks 1 and 2. Your quiz will be in Week 3 located in the Quiz Tab.
Your quiz will mostly comprise of multiple choice, true/false, and essay questions. The answers are at th
Statistics: Science of collecting, organizing, analyzing, and interpreting data in order to make decisions
Data: information coming from observations, counts, measurements or responses
Data Sets
I. Populations: collection of all outcomes, response, measur
Chapter two notes
Exploratory Data Analysis
I. Stem and Leaf Plot
a. Separate data into stem and leaf
a.i. Stem = data leftmost digits
b. Leaf = single, rightmost digit (plot should have leaves for every data set)
b.i. Plots can be ordered or unordered (s
Chapter 3: Probability
Probability Experiments: action/trial that result in specific results (counts, measurements, responses)
Outcome = single trial
Sample space = set of all possible outcomes of exp.
Event = subset of sample space (may= more than one ou
Chapter 4 Binomial distributions Sec. 4.2
Binomial experiment probability experiment that is repeated for a fixed number (n) and is independent of
other trials
There are only 2 outcomes (S) success or (F) failure
P(S) probability of success is the same
Chapter nine Correlation and Regression
9.1 Correlation
I.
Regression line line on scatter plot that follows the two sets of dots from the paired descriptive
statistics data set
Correlation = a relationship between two variables. Data can be ordered pairs
How to Logon to MiniTab and Access the Class Survey Data File
DeVry University
Math 221
Enter the iLab option under Course Home (or get there directly from http:/lab.devry.edu)
Click the link Go to Citrix under Links & Resources.
You will be taken to the