TAKE HOME EXAM: Students may work with each other, but are NOT to get help from other people.
STA 2023 Exam #3
Name: _
SFCC ID#: _
1. This is a TAKE HOME EXAM. You may use your notes, book, and work with classmates.
However, you may NOT talk to anyone bes

Exam
Name_
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
Classify the variable as categorical or quantitative.
1) A person's height in feet
A) Categorical
B) Quantitative
2) A person's gender
F) Cat

Some Topics on Exam 2
Reading scatterplots; identifying form, direction, strength, and outliers (Ch. 6)
Correlation is a measure of the strength of a linear relationship; 1 < r < 1 (Ch 6)
Knowing the conditions needed to use correlation and its propertie

Statistical Tasks Using the TI-83 or TI-84 Calculator
To find the mean, standard deviation, median, quartiles, etc. from a single
data set:
1. Enter the data into the calculator: Press STAT, then choose 1: Edit., then
enter all the data into the first col

STA 2023 Lab Worksheet #1
Name: _
SFCC ID#: _
For this Lab, you will need to access a computer program called Minitab. There
are a few ways you can do so there are computers with Minitab installed in the Math
Labs at both the main campus and downtown camp

Exam Answer Key
1) B
2) F
3)
4)
Key:
7
= 72%
5) B
6) H
7) C
8) K
9) A
10) J
11) E
12) G
13) D
14) J
15) A
16) G
17)
There is a strong, positive, linear association between the year and the first class postal rate.
Postal rates have increased over time.
18

STA 2023 - Statistics 1 o ’ TEST 4 Name:
Show all of your work clearly in the space provided for full credit. You may use calculators on this exam. When
appropriate, answer questions using complete sentences
1. Some people are concerned that new tougher

STA2023
Lab 1
Name(s): Khalid Snowden
The following lab is to give you a chance to generate your own graphs and statistics using software.
Paste your graphs and statistics on this word document, use these graphs and statistics to answer a few questions, a

Sample Multiple Choice Questions for Exam 1
Use the following information to answer Questions 1-3:
The histogram below shows data on the salaries for 31 employees in a business.
1. What is the best description of the shape of the data in the histogram abo

Statistical Tasks Using the TI-83 or TI-84 Calculator
To find the percentage of an area in the normal distribution, given one or two
cutoffs:
1. Draw a picture of the normal distribution, including the mean in the
middle and the cutoffs placed appropriate

Statistical Tasks Using the TI-83 or TI-84 Calculator
To find the probability of getting a certain number of successes in the
Binomial model:
1. On the calculator, press 2ND, then VARS, and choose 0: Binompdf(
2. Type in the number of trials (n), then a c

Probability Theory Worksheet 1 Key
Solve the problems below using your knowledge of probability. Write fractions in lowest terms.
4
52
1. What is the probability of choosing a king from a standard deck of playing cards?
=
1
13
2. What is the probability o

Probability Theory Worksheet 2 Key
Solve the problems below using your knowledge of probability. Write fractions in lowest terms.
1. What is the probability of choosing an ace from a standard deck of playing cards?
4
52
=
1
13
2. What is the probability o

Additional Help for Finding Probabilities Using a Venn Diagram
Note: Be sure you know when you can use a Venn diagram to calculate a probability. You can not use the Venn diagrams
discussed in this course to calculate all probabilities. You can use the Ve

STA2023
Lab 1
Name(s):
Madison Parker
The following lab is to give you a chance to generate your own graphs and statistics using software.
Paste your graphs and statistics on this word document, use these graphs and statistics to answer a few questions, a

Summary statistics:
Column
BWT
n
Mean Std. Med Ran Mi Max Q1 Q3 IQ
dev ian ge
n
R
.
189 2944. 729. 297 428 709 499 24 34 10
6561 022
7
1
0
14 75 61
42
Summary statistics:

Starter #6 (09-22-2015)
Medical researchers have conducted a study
where they collected data on 650 high blood
pressure patients. They measured each persons
systolic blood pressure as well as the number of
5 oz. servings of red wine each person drank in
a

Some Topics on Exam 1
Identify cases and variables in a data situation (Chapter 1)
Think about details of data, including who is asking about the data, what data is
being collected from each case, why the data is being collecting are
collecting data, and

Starter #7 (09-29-2015)
Suppose the following scatterplot shows
data collected in 2002 on the distance
college students without a cell phone were
away from home, and how much they spent
on long distance calls in one month:
a) What are the cases in this su

Solutions to All Sample Questions for Exam 2
Multiple Choice
1. B
2. D
3. C
4. B
5. C
6. B
7. D
8. D
9. C
10. C
11. A
Free Response
1. a) To find the equation, we first need to find the slope, using the formula
b1 = r (std dev of y / std dev of x). In thi

Sample Free Response Questions for Exam 1
1. Suppose that the table below gives information on the church (or other place of worship)
attendance habits and the job satisfaction of a sample of 200 American adults:
Very Satisfied
Mostly Satisfied
Somewhat S

Sample Multiple Choice Questions for Exam 2
1. Suppose that the correlation between the amount of a particular herbicide used on a
plant and the height of that plant after 6 months of growth is 0.7417. What can this
correlation tell us about the relations

Solutions to All Sample Questions for Exam 1
Multiple Choice
1. A
2. B
3. D
4. D
5. B
6. D
7. A
8. A
9. C
10. B
11. D
12. B
Free Response
1. a) The variables in this study are place of worship attendance habits and job
satisfaction.
b) 60 / 200 = 30%
c) 2

Sample Free Response Questions for Exam 2
1. Market researchers would like to use the number of credit hours a student is enrolled in for a
semester to predict how much money they spend at on-campus eateries per week during that
semester. To study this, t

Sample Multiple Choice Questions for Exam 3
1. In the context of probability, what does the notation P(AC) represent?
a) The probability that A and C both happen at the same time.
b) The probability that A happens, given that C has already happened.
c) Th

Solutions to All Sample Questions for Exam 3
Multiple Choice
1. C
2. B
3. D
4. B
5. A
6. D
7. C
8. C
9. B
10. D
11. A
12. C
13. A
Free Response
1. a) P(ring the bell) = 1 P(1, 2, 3, or 4 stars) = 1 0.29 0.48 0.13 0.07 = 0.03.
b) Average value of X = 1(0.2

Sample Free Response Questions for Exam 3
1. A popular game at many carnivals is the Test Your Strength game, in which the
objective is to strike a pad as hard as possible with a big mallet in hopes of ringing the
bell. Modern electronic versions of these

Starter #1 (08-27-2015)
Data is regularly collected on collegiate
student-athletes in Florida. One study,
conducted each year by the state in the
spring semester, records the athletes
college, sport played, and previous
semesters GPA.
a) What are the case

Some Topics on Exam 3
Identifying whether a study is observational or experimental (Chapter 11)
Knowing the principles of experimental design and how they are executed in
experimental studies (Chapter 11)
Knowing how the use of a placebo and a blind or do

Starter #3 (09/03/2015)
Suppose that the chart shown below was
made for you by your colleagues and you
will be using it as part of your presentation:
Identify two issues with the graph that you
will want to fix before your presentation,
and explain why ea

STA 2023
Data Analysis Laboratory
Sample Average (Mean) X
Standard Deviation X
First Quartile X
Third Quartile X
IQR X
Max X
Min X
Range X
Median
Sample Average (Mean) Y
Standard Deviation Y
First Quartile Y
Third Quartile Y
IQR Y
Max Y
Min Y
Range Y
Medi