STA 2023: Introductory Statistics
Fall 2016
Name:_
Section Number:_
Chapter 1 Homework Problems
Due Friday September 2, 2016
Submit to your TA in your help session
1) The personnel department keeps records on all employees in a company. Here is the
inform

Exam 1
Part I.
Provide an answer for the following multiple choice, short answer, fill-in-the-blank, and
true/false items. Each item in this section has a value of 1 point.
Remain calm, take a deep breath, and stay focused. Good luck!
1. The research proc

Exam 3
In Part I, each item is worth 1 point. The value of each item in Part II varies, but are provided in
the parentheses. You have 2 hours and forty-five minutes to complete both parts (Part I and Part
II) of this exam.
Breathe. You got this, champ! Go

Exam 2
Part I.
Please provide an answer for the following 30 true or false and multiple choice items in Part I.
In this section, each item is worth 1 point. You have 2 hours and 45 minutes to complete both
parts (Part I and Part II) of this exam.
Think cr

NAME: _
SECTION: _
TEST 1:
Statistical Concepts
<Semester>
It is recommended that the instructor take the exam and time themselves; the students
should have three-to-four times the amount of time it takes the instructor. This exam is
written for a 50 minu

Chapter 4
Example 1:
Given the three events are mutually exclusive and are the simple events which form the sample
space, determine which of the following probability distributions are plasuble; if the probability
distribution is implausible, state why.
a

Chapter 1
Example 1
Determine if the described variable is quantitative or qualitative. For every variable identified
as quantitative, determine if the measure is discrete or continuous.
a)
b)
c)
d)
e)
f)
The length of time between full moons
The number o

STA 2023: Introductory Statistics
Fall 2016
Name:_
Section Number:_
Chapter 3 Homework Problems
Due Friday September 23, 2016
Submit to your TA in your help session
1. Find the mean, median, and mode for the following data sets.
a. 12, 5, 6, 5, and 12
b.

STA 2023: Introductory Statistics
Fall 2016
Name:_
Section Number:_
Chapter 4 Homework Problems
Due Friday October 7, 2016
Submit to your TA in your help session
1. List explicitly the members (elements) of the following sets:
a. cfw_| , 5
b. cfw_| , < 5

Chapter 3
Example 1:
Use the table of grouped data below to find the sample mean , the sum of squares SS, and
the sample standard deviation s of the data: (label each clearly)
3
4
5
6
8
Total
1
3
2
2
1
9
=
3
12
10
12
8
45
-2
-1
0
1
3
( )2
4
1
0
1
9
1

STA 2023: Introductory Statistics
Fall 2016
Name:_
Section Number:_
Chapter 3 Homework Problems
Due Friday September 23, 2016
Submit to your TA in your help session
1. Find the mean, median, and mode for the following data sets.
a. 12, 5, 6, 5, and 12
mea

Please answer the following questions:
Formulas:
Cohens d =
M
1. True or False In general, the null hypothesis states that the treatment has no effect on the
population mean.
2. True or False In a hypothesis test, the critical region consists of sample o

Computational formula for sum of products:
SP = XY
( X ) ( Y )
n
SP
( SS X ) ( SSY )
r=
Please answer the following questions:
1. True or False A researcher observing children on a school playground noticed that the number of
aggressive acts tends to inc

Please answer the following questions:
1. A vertical line drawn through a normal distribution at z = +0.50, and separates the
distribution into two sections. What proportion of the distribution is in the larger section?
+0.50
.6915 or 69.15%
2. A normal d

Please answer the following questions:
1. A researcher conducts an experiment to determine whether the presence of video cameras have any
effect on theft in public schools. For this study, what is the independent variable?
Video cameras
2. In a study eval

Please answer the following:
1. True or False One reason for transforming X values into z-scores is that the set of z-scores
will form a normal distribution.
2. True or False If an entire set of scores (X values) is transformed into z-scores, the set of z

1. True or False The larger the differences among the sample means, the larger the numerator
of the F-ratio will be.
The numerator of the F-ratio captures the differences between sample means (in addition to any
treatment effects). This item is assessing

Youmayworkingroupstoanswerthefollowing13questions,buteachstudentMUSTsubmittheirown
answersonseparatepages.ThisassignmentisdueattheBEGINNINGofclassonTuesday,August2,
2015.Ifyoudonothavethetextyet,youshouldstillbeabletoanswerthesequestionsgivenlastnights
le

Chapter 4
Example 1:
Given the three events are mutually exclusive and are the simple events which form the sample
space, determine which of the following probability distributions are plasuble; if the probability
distribution is implausible, state why.
a

Formula for estimated standard error:
sM
=
s2
n
Formula for t statistic:
t=
M
sM
Formula for Cohens d:
Cohens d =
M
s
Please answer the following questions:
1. True or False
The larger the value for df, the more a t distribution resembles a normal distr