Moving Beyond Linearity
The truth is never linear!
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Moving Beyond Linearity
The truth is never linear!
Or almost never!
1 / 23
Moving Beyond Linearity
The truth is never linear!
Or almost never!
But often the linearity assumption is good enough.
1 /
BIOSTATISTICS PUBLIC HEALTH 5002
Fall 2016
Quiz 5
Instructions: Each question is worth 2 point. There is no penalty for guessing, therefore do not
leave blanks on the EXCEL answer sheet. A blank will get a zero, but the correct answer (could
also be the b
Final Exam Solutions
1. (8) Write the best answer below the question for the following multiple choice
questions. No explanation necessary.
(1) Ten tidal pools of the same size were found in a certain coastal region. It was
randomly determined which 5 wou
BIOSTATISTICS PUBLIC HEALTH 5002
Fall 2016
Quiz 4
Instructions: Each question is worth 2 point. There is no penalty for guessing, therefore do not
leave blanks on the EXCEL answer sheet. A blank will get a zero, but the correct answer (could
also be the b
BIOSTATISTICS PUBLIC HEALTH 5002
Fall 2016
Quiz 1
Instructions: Each question is worth 2 point. There is no penalty for guessing, therefore do
not leave blanks on the EXCEL answer sheet. A blank will get a zero, but the correct answer
(could also be the b
BIOSTATISTICS PUBLIC HEALTH 5002
Fall 2016
Quiz 3
Instructions: Each question is worth 2 point. There is no penalty for guessing, therefore do not
leave blanks on the EXCEL answer sheet. A blank will get a zero, but the correct answer (could
also be the b
BIOSTATISTICS PUBLIC HEALTH 5002
Fall 2016
Quiz 2
Instructions: Each question is worth 2 point. There is no penalty for guessing, therefore do
not leave blanks on the EXCEL answer sheet. A blank will get a zero, but the correct answer
(could also be the b
7.5 Test of Hypothesis about a Population Mean :
Students t-Statistic
This section deals with the case when the sample size is small and is not known.
We will be assuming that the population is normal.
P-value:
Ha
Ha: > 0
p-Value (= area of shaded region)
Sample Exam #1
Elementary Statistics
Instructions. No books, notes, or calculators are allowed.
1. Some variables that were recorded while studying diets of sharks are given below.
Which of the variables are categorical?
A. The amount of food eaten in a d
STAT 350 Practice Final Exam Solution (Spring 2015)
PART 1: Multiple Choice Questions:
1) A study was conducted to compare five different training programs for improving
endurance. Forty subjects were randomly divided into five groups of eight subjects in
AP Statistics
Chapter 11-12 Review
1. In formulating hypotheses for a statistical test of
significance, the null hypothesis is often
A. a statement of no effect or no difference.
B. the probability of observing the data you
actually obtained.
C. a stateme
Stat 2512, Fall 2016
Intermediate Statistics
Basic Information:
Instructor: Yuexiao Dong
Oce: Speakman Hall 348
Telephone: (215) 204-0670
E-mail: ydong@temple.edu (Please put Stat2512 into the subject of
the email.)
Class: Tuesday and Thursday 2:00 pm-3:2
Stat 2512, Midterm Sample Exam 2
1. (5 points) Suppose Y1 Gamma(1 , ) and Y2 Gamma(2 , ), 1 >
0, 2 > 0, > 0. Furthermore, Y1 and Y2 are independent. Find the pdf of
Z = Y1 + Y2 .
Solution: Because Y1 and Y2 are independent, we have
MZ (t) = E(eZt ) = E(e(
Stat 2512, Midterm Sample Exam 3
1. (5 points) The moment generating function of X is
1
MX (t) = (2 + et + e2t );
4
the moment generating function of Y is
1
MY (t) = (et + e2t + e3t );
3
X and Y are independent random variables. Let W = X Y . Find the
mom
Stat 2512, Midterm Sample Exam 1
1. (5 points) Z is standard normal, or Z N (0, 1). Find the pdf of U = Z 2 .
Solution: Use method of cdf, for u 0, FU (u) = 0 and consequently fU (u) =
0. For u > 0, we have
FU (u) = P (U u) = P (Z 2 u) = P ( u Z u) = FZ (
Exercise 1.6 Extra Credit
What kind of sample is used in each case: Simple random, systematic, cluster, stratified,
convenience, or expert?
1. In order to test a new chocolate bar, Hershey asked employees to have their children try
it. Simple Random
2. Co
Quantitative Literacy (Spring 2015)
Homework Assignment # 2
1. Construct a frequency distribution for the following sample of data. cfw_0,5,8,7,6,0,2,5,3,7,2,2,6
Identify the mean, median, and mode of this dataset.
Variable X
Frequency
0
2
3
5
6
7
8
Total
Quantitative Literacy (Spring 2015)
Homework Assignment # 1
Short Answer
In a few sentences (1-4) answer each of the following questions.
1. What is the main difference between nominal and ordinal level data? Provide an
example of each.
The nominal level
14. Par, Inc., is a small manufacturer Of golfequipment and supplies. Par's distributor
believe a market exists for both a medium-priced golf bag, referred to as a standard
model, and a high-priced golf bag, referred to as a deluxe model. The distributor
1
Homework 5 Revised:
Alexandra Yanovski
6: Write a sentence reporting the results for the t test on WkshtScore in APA style, being sure to include both the verbal description and
the numerical (statistical) information. Use the class handout on APA style
1
EDUC 5325, Fall, 2013
SPSS Homework #2
Q2 (15)
Q3 (2)
Name: Mariya Yanovski
_
_
Q5 (5)
_
Q6-10 (5)
_
Output (13) _
Date: 9/17/2013
/40
%
The assignment
In this homework, you will use the same complete, previously saved SPSS data set to
calculate the sta
1
EDUC 5325, Fall, 2013
SPSS Homework #1
Name: _
Q9 (6)
Q12 (1)
Q14 (1)
_
_
_
Output (4) _
Date: _
/12
%
The dataset
You will spend the next 12 weeks analyzing data collected from a sample of high school
students. The following data were collected:
demog
1
EDUC 5325, Fall, 2013
SPSS Homework #1
Q9 (6)
4.32
Q12 (1) .5250
Q14 (1) If you multiply/divide each score by a constant
value, you can multiply/divide the old mean by that same
constant, and you'll get the new mean.
Output (4) _
Name: Mariya Alexandra