Benn Li
1. If the null hypothesis of a one-way ANOVA is true, you expect the value of F to be approximately equal to:
a. 0 El
c. dfmul, ldfm d. It depends upon the sample size.
2. In a one-way ANOVA, SSW is based upon:
a. The differences between indivi
Exam 3
We base our expectation of the shape of the sampling distribution of the difference between two
means on
a) the Variance Sum Law c) the Central Limit Theorem
b) the Pythagorean Theorem (1) the Old Testament
If the standard deviation of the popul
The Normal Distribution: bell shaped curve, symmetric, unimodal. Mean, median, mode same value;
negative positive infinity
Sampling Distribution of the Mean: theoretical distribution of the hypothetical set of sample means
obtained by drawing an infinite
Variance Sum Law: variance of the sum or difference of two independent variables is equal to the
sum of their variances.
Standard Error of Differences Between Means: standard deviation of the sampling distribution of
specific statistic (ex. Two means). Ho
Population: entire collection ofInterquartile
events
range: discard upper and
studied.
lower 25%
Sample: group that representsTrimmed
the
Sample: portions of tails removed
population.
from data
Statistics: measures based onTrimmed
samples. Statistics: tri
Statistics:
Rules, procedures, and methods for:
o Summarizing variables
o Describing relationships between variables
o Representing variables and relationships graphically
o Determining whether differences between groups, or relationships between variable
Chi-Square Practice Problems
For each of the problems below,
a. Please state both the null and alternative hypotheses for this question.
b. Provide the decision rule for making this decision. Use an alpha level of .05.
c. Show all of the work necessary t
You reject the null hypothesis is your observed statistic exceeds your critical value OR if your p
value is less than your alpha value
Chosing a test
Dependent Variable
Continuous(blood
pressure,age,pain score)
Categorical(breast
cancer yes/no)
Test Name
Statistics Study Guide
Final: Factorial Anova(ch 17), One Way Anova(Ch 16), Regression(ch 10), Correlation (ch 9),
Chi Squared (ch 19)
Chosing a test
Dependent Variable
Continuous(blood pressure, age,
pain score)
Categorical( breastr cancer
yes/no)
catego
Assignment 2
Lab Assignment 2
Attention! Late assignments turned in after the due date will not be graded.
All results should be processed using SPSS.
Upload your SPSS dataset file (the ones end with .sav), output file (the ones end with .spv) along
with
Assignment 1
Lab Assignment 1
Upload your SPSS dataset file (the ones end with .sav), output file (the ones end with .spv) along
with this document (Microsoft Word, ending with .doc or .docx) when you submit your assignment
on Canvas. Failing to comply wi
to/lo
Assignment 2
NAME:
DUE:
At the beginning of lab on 10/10/12. Late assignments have-10 points deducted per day they
are late.
The programming language you need to complete this assignment was given layout durmg labs 1-8.
Those labs are also ava
(112/ We
Assignment 1
NAME:
DUE: At the beginning of lab on 09/19/12. Late assignments have 10 points deducted per day they
are late.
The programming language you need to complete this assignment was given to you during labs l-5.
Those labs are also a
Emm \
(1) Which of the following is the appropriate pairing?
(a) Populationzparameter, sample:statistic
(2) Ms. Sweetwater's biology class has a standard deviation of 2.4 on a standardized test, while Ms.
Quincy's biology class had a standard deviation
an
Assignment 4
NAME:
DUE: At the beginning of lab on 11l28/12. Late assignments will have 10 points deducted per
day they are late.
The programming language you need to complete this assignment was given. to you during lab F.
This lab is also availabl
Chapter 19:
Chi-Square (5122) Tests of Goodness
of Fit
and Association
Categories 9 Frequencies
- Question: If categorical data arent numeric,
then what do we analyze?
- Answer: Frequencies (a.k.a. counts)
- 50: We analyze the counts (frequencies) of
Assignment 3 4],
NAME: .
DUE: At the beginning of lab on 11/14/12. Late assignments will have 10 points deducted per
day they are late.
The programming language you need to complete this assignment was given to you during labs
10-] I. These labs are als
PY 214-2C Practice Final
Fall 2013
1. Friedman and Rosenman (1974) have suggested that personality type is related to heart
disease. Specifically, type A people, who are competitive, driven, pressured, and
impatient, are more prone to heart disease. On th
1Practice exam #3
1. A researcher is studying the effect of injections of a stress hormone on mood. 3 groups of
receive either a high dose of the hormone, a low dose, or a placebo Afterward, each subject rates
his/her mood on a 15 point scale (high scores
1 A researcher is studying effects of an experimental Aaversion therapy @ on desire to eat
fattening foods. 9 subjects are tested before and after therapy in the following manner: all
subjects are shown a series of pictures of chocolate desserts and snack
1 A researcher is studying effects of an experimental Aaversion therapy@
on desire to eat fattening foods. 9 subjects are tested before and after
therapy in the following manner: all subjects are shown a series of pictures
of chocolate desserts and snacks
1Practice test #4
1. Suppose a researcher is studying the relationship between time spent sleeping and
ability to memorize a list of words. Each of 7 subjects is asked how many hours he or
she slept the night before and is then given 5 minutes to memorize
1PY214: Practice exam #1
1. The following sample contains 20 scores:
6 10 14 16 20 20 22 24 28 30 34 36 44 44 50 52 66 70 82 100
A. Construct a stem and leaf display and describe the shape
of the distribution in terms of symmetry/skewness and modality
(15
Correlation/regression homework
Suppose the following are values obtained from 8 students regarding their study time (in
hours not minutes!) and their ratings of confidence prior to the exam.
X
Y
(Study time) (Confidence)
4
1
2
2
4
4
6
5
10
7
8
4
10
9
12
1. As part of a study 210 subjects are weighed at the start of the study and
then one year later, On the basis of the difference in the two weights, they
are classified
as losers, maintainers, or gainers. The frequencies within each category are
as follow
1PY214 homework, 2/8/11
1. Suppose you have a normal parent distribution with :x = 50 and Fx = 10. Find p(0 > 55) for
A. N=4
B. N=10
C. N=25
2. Assume that you have 10 different drivers test the gas mileage of a particular model of car.
The values below a