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DeVry University
Math 221
Enter the iLab option under Course Home (or get there directly from http:/lab.devry.edu)
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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,
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 relati
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 o
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
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 ev
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. Po
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.