PSYCHOLOGY 293 EXAM 3 FORMULA SHEET
CONFIDENCE INTERVALS:
Based on z
X z X X ts X s n
or =
where,
X =
or n
ONE-WAY ANOVA (CONTINUED):
=
n
2
Mean Squares:
MSgroup =
F-ratio:
Based on 1-sample t where,
df = n 1
sX =
s2 n
SSgroup dfgroup
F=
MSgroup MSerro
STAT2103 Midterm II Practice Test (1 hour 20min) Closed Book/Notes Formula sheet/Calculator are allowed Answer all the questions (Expect around 25 multiple choice questions) Syllabus: Sections 4.1, 4.2, 4.3, 4.6, 4.11; Section 1.6; Chapter 5: Sections 5.3
FINAL EXAM - Statistics 2103
Use thefollowingto answerquestion1:
In a statisticsclasswith 136students,theprofessorrecordshow muchmoneyeachstudenthasin their
possessionduringthefirst classof thesemester. The histogrambelowshowsthedatacollected.
1. The hist
Use the following for problems 1-2:
Let X represent the number of children in an Egyptian household. The probability
distribution of X is as follows:
x
p(x
)
1
2
0.25 0.3
3
3
0.1
7
4
5
0.15 0.10
1. What is the probability that a randomly selected Egyptian
NAME
EXAM 1, there are 35 questions plus 1 bonus item;
Side 1 of 2
EXAM INSTRUCTIONS: YOU MUST USE PENCIL. Enter the following information on the Blue Scantron sheet.
Please Bubble in your Entire TUID#, for TEST CODE, enter 01, then enter your Last & Firs
Stat 2103
Prof Hopson
Exam 1
Please show ALL work for credit. No work = No credit.
; Z = (x-u)/sigma; u = n*p; sigma2=n*p*(1-p);
; p(a U b)=p(a)+p(b)-p(a^b)
1) The payoff (X) for a lottery game has the following probability distribution. If you win, with
Simple and Multiple Regression
10.1 and 10.2
Probabilistic Model
The equation of a straight line model is represented as:
y 0 1 x
1 , 2 , n are the unknown error components that represent the deviations of the observed
value of y from the fitted value o
Show all your work here. On the scantron, select the best answer.
1. A survey typically records many variables of interest to the researchers involved. Below
are some of the variables from a survey conducted by the U.S. Postal Service. Which of
the variab
HW Preview Day 6
11.10) The following table is used for making the preliminary computations for finding the least
squares line for the given pairs of x and y values. The values chosen here relate to the weights
and heights of 6 Eagles players:
Name
Nick F
Day 3 HW Preview
2.59 Calculate mean, variance, and standard deviation for four data sets.
a)
b)
c)
d)
4, 6, 8, 12, 20
-3, -3, -3, -3, 12
.01, .08, .09, .03, .09
2 pounds, 1 pound, 1.5 pounds, 1 pound, 1 pound
2.64 Use excel to find range, variance, and s
Day 2 HW Preview
2.6 Given raw data find relative frequencies. Use them to create a bar graph and a pareto
diagram.
Fast Food Restaurant Types
Burger
Chicken
Taco
Pizza
Other
Count
48
34
39
28
44
2.18 Create a relative frequency histogram from Measurement
HW Preview Day 7
11.59) Describe the slope of the least squares line if
a) r = .8
b) r = -.8
c) r = 0
d) r2 = .49
11.60) Explain what each of the following sample correlation coefficients tells you about the
relationship between the x and y values in the
HW Preview Day 13
4.85) Find the following probabilities for the standard normal random variable z:
a) P(z>1.88)
b) P(z<-1.28)
c) P(.35<z<1.19)
d) P(-.77<z<2.38)
e) P(z>-2.01)
f) P(z<1.61)
4.88) Find a value of the standard normal random variable z, call
HW Preview Day 9
3.10) A family feud question asked Name a recreational activity normally done in hot weather.
Of the 100 people surveyed: 45 said swimming, 19 said baseball, 17 said volleyball, 12 said
surfing, and 7 said boating.
a) List the sample poin
Day 1 HW Preview
1.6 Explain the difference between a population and a sample.
1.15 100 New York City accounting firms are each given identical tax information for an
individual. The firms then generate a tax return for the individual. We look at two key
1) The school newspaper surveyed 100 commuter students and asked two questions.
First, students were asked how many courses they were currently enrolled in. Second,
the commuter students were asked to estimate how long it took them to drive to
campus. Con
HW Preview Day 14
4.71) The number of days it snows in November can be approximated by a poisson
distribution with a mean of 2.
a) What is the probability that it never snows in November?
b) What is the probability that it only snows one day in November?
1) The school newspaper surveyed 100 commuter students and asked two questions.
First, students were asked how many courses they were currently enrolled in. Second,
the commuter students were asked to estimate how long it took them to drive to
campus. Con
Mon
Thu
Sun
Wed
Sat
Tue
Fri
Mon
Thu
Sun
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
Monday
Tuesday
Wednesday
Thursday
August
Sep
December Oct
April
Nov
August
Dec
December Jan
April
Feb
August
Mar
December Apr
April
May
August
Jun
2/20/2014
2/25/201
ANSWER KEY FOR STAT-2103 SAMPLE FINAL EXAM
[#1] B
[#2] A
[#3] C
[#4] D
[#5] D
[#6] E
[#7] C
[#8] D
[#9] C
[10] D
[11] D
[12] C
[13] C
[14] B
[15] A
[16] B
[17] D
[18] C
[19] D
[20] A
[21] A
[22] D
[23] B
[24] B
[25] D
[26] E
[27] E
[28] A
[29] D
[30] E
[
STAT2103
[SAMPLE]
BUSINESS STATISTICS
SAMPLE
FINAL EXAM
NAME:
E-MAIL:
INSTRUCTIONS: Please choose the letter that corresponds to your choice
for the correct answer to each of these 75 questions. This is an open book
exam, so you can use any reference mat
HTTP:/WWW.THEPEARLGIRLS.COM/WHAT-MAKES-PEARLS -VALUABLE/
PEOPLE WANT TO KNOW.WHAT MAKES
PEARLS VALUABLE?
Posted on August 22, 2011 at 10:14 pm by karla-schott / About Us and Our Jewelry, Cultured Pearl
Jewelry, Our Press, Uncategorized / 0
What makes pear
DISCRETE PROBABILITY DISTRIBUTIONS
AND THE BINOMIAL DISTRIBUTION
AND THE POISSON DISTRIBUTION
Q: What is a random variable?
A: A random variable is a numerical value we get
from a probability experiment (e.g. rolling a
pair of dice, counting defective pr
1
DESCRIPTIVE STATISTICS Numerical Measures
RECALL: The term Descriptive Statistics refers to any
statistical tool whose goal is to organize and
summarize a large collection of data values.
EXAMPLES: DESCRIPTIVE STATISTICS
Frequency Distribution Table
H
TOPIC #1:
What is Statistics?
Q: What is meant by the term:
Statistics ?
A: The term Statistics actually
has 2 distinct meanings:
[#1] The branch of mathematics
which studies how to gather,
organize, and analyze a set
of data values.
[Statistics with a c
HW Preview Day 5
2.121) Construct a scatter plot for the data in the following table:
Variable 1:
Variable 2:
15
2
4
14
3
11
11
5
1
19
10
4
8
7
2
12
13
5
6
10
2.123) Does it appear that average income is associated with years of experience? The
researcher
HW Preview Day 12
4.14) Explain why each of the following either is or is not a valid probability distribution
for the random variable x.
a)
x
p(x)
c)
1
.5
2
0
3
.29
4
.21
x
p(x)
b)
x
p(x)
3
.01
4
.97
7
.03
9
-.01
1
.25
2
.35
7
.35
8
.05
d)
-1
.11
0
.33
1
NAME_
DATE/TIME_ SECTION_
STAT 2103
TAKE HOME QUIZ
CHAPTER 8
Directions: This is a take home quiz which should take you 30 minutes to do or less. You may
consult a textbook or your notes and you will need your own t-distribution and normal
distribution ta