MA 207 - Lab 3
September 26, 2013
Answer each of the questions listed below. Submit your written answers in a Microsoft Word (or compatible)
format through the course Moodle site. You may work on your own or in groups of 2 on this assignment. Only one
stu
1. Dene reliability and validity with regards to measurement scales. Discuss how each is measured.
2. Give an example of a sample with:
(a)
(b)
(c)
(d)
(e)
Voluntary response bias
Convenience sampling bias
Undercoverage bias
Survivership bias
Nonresponse
1. Dene reliability and validity with regards to measurement scales. Discuss how each is measured. (Refer to textbook
and notes)
2. Give an example of a sample with: (Refer to textbook and notes)
(a)
(b)
(c)
(d)
(e)
Voluntary response bias
Convenience sam
MA 207 Lab 2 Correlation of Bivariate Data
The Stroop Interference Study
In this lab we will study a real dataset in Excel. Your answers to the questions below
should be typed up in a Word document and submitted electronically through Moodle by
class-time
MA 207 Lab 1 Plotting and Describing Data
The Angry Moods Study
In this lab we will study a real dataset in Excel. Your answers to the questions below
should be typed up in a Word document, printed out, and turned in on Friday, September
13th. Please writ
Section 7: The Normal Distribution
Page 1 of 3
The Normal Distribution
A normal distribution has the following properties:
It is symmetric about its mean.
The mean, median, and mode are all equal.
The area under the curve is 1.
It can be completely de
Section 6: Experimental Design
Page 1 of 4
Goal
We want to determine useful information about a population by gathering information about a sample.
Problem
Samples can be biased. (i.e. they may not accurately represent the population).
Solution
Choose a s
Exam 1 Review Topics
September 10, 2013
Exam 1 will cover topics from chapters 1 through 3 in our textbook. For exam 1, you should be able to:
Read and interpret data presented in histograms, bar charts, pie charts, line graphs, box plots, stem-
and-leaf
Exam 2 Redemption
To help compensate for the scores on Exam 2, you will have the opportunity earn back up to half of the
points you missed on each problem by correcting your mistakes. If you did not miss points on a
problem, you may not correct your work.
Section 5: Probability
Page 1 of 15
Probability
Denition:
A set of outcomes is said to be
symmetrical
if each outcome
has an equal likelihood of occurring.
Denition:
Given a set of symmetrical outcomes, the
probability
event occuring is simply
P robabilit
Section 5: Probability
Page 1 of 8
Permutations and Combinations
Example: Suppose there are three runners in a race. How many possible
outcomes are there?
Section 5: Probability
Page 2 of 8
Example: Suppose there are 10 runners in a race and each has an e
Section 4: Describing Bivariate Data
Page 1 of 4
Bivariate Data
Denition:
A dataset with two quantitative variables for each individual
contains what is called
Denition:
A
bivariate data.
scatter plot
it on a Cartesian plane.
is a graph that displays biva
Section 3: Summarizing Distributions
Page 1 of 19
1. A data set consists of fty three-digit numbers ranging from 180 to 510.
The best choice for stems in a stem-and-leaf display would be to use
_.
(a) 1 digit stems (1, 2,
. . .,
(b) 2 digit stems (18, 19,
Section 2: Graphing Distributions
Page 1 of 13
Qualitative Data
Frequency Table:
The following table gives the number of passengers on the Titanic broken
down by class.
Class
Count
First
325
Second
265
Third
706
Crew
885
Section 2: Graphing Distributions
Section 1-1: What are Statistics?
Denition:
Page 1 of 18
A statistic is a fact or piece of numerical data. The study of
statistics involves calculation (e.g. coming up with data) and interpretation
of the data.
Section 1-1: What are Statistics?
Page 2 of