Name:
Math 1011 Intro to Statistics
Summer 2012
2 -test
7/09/12
1. A juror pool should reect the composition of the county in which the trial is taken place. 62 people
received a jury summons for a particular case; the education level of these jurors, an
Name:
Math 1011 Intro to Statistics
Summer 2012
Two sample tests
7/06/12
1. A study is conducted to see if a medication reduces blood pressure. 200 subjects are divided into a
treatment group and a control group. The 94 person treatment group averaged a
Name:
Math 1011 Intro to Statistics
Summer 2012
One sample tests
7/05/12
1. It is claimed that smokers need less sleep than the general public, which requires an average of 7.7 hours
of sleep each day. 50 smokers were randomly selected, and found to requ
Name:
Math 1011 Intro to Statistics
Summer 2012
Review
6/28/12
1. An urn contains 10 black balls, 20 white balls, and 30 red balls.
(a) Find the probability that there is at least one red ball in 4 draws without replacement.
(b) Find the probability that
Name:
Math 1011 Intro to Statistics
Summer 2012
Random Variables
6/25/12
1. A coin is weighted so that it comes up heads 60% of the time, and tails 40% of the time.
(a) Find the expected value and the standard error for the number of heads in one ip.
(b)
Name:
Math 1011 Intro to Statistics
Summer 2012
Probability
6/22/12
1. An urn contains 5 red balls, 7 yellow balls, 3 blue balls, and 10 green balls.
(a) 5 balls are drawn without replacement. Find the probability that exactly 3 are yellow given that
exa
Name:
Math 1011 Intro to Statistics
Summer 2012
Review
6/18/12
1. Compute the mean and standard deviation of each of the following data sets:
(a) cfw_2, 2, 2, 6, 8, 8, 12, 16
(b) cfw_10, 8, 6, 6, 5, 3, 1, 1
(c) cfw_6, 4, 2, 0, 2, 4, 10, 12
(d) cfw_21, 18
Name:
Math 1011 Intro to Statistics
Summer 2012
The Normal Distribution
6/13/12
1. 150 students take a statistics exam. The scores are normally distributed with a mean of 78 and a
standard deviation of 7.
1. How many As were there?
2. How many Bs were th
Name:
Math 1011 Intro to Statistics
Summer 2012
Histograms
6/12/12
1. A die is tossed 72 times. The outcomes are summarized in the following table:
Spots
1
2
3
4
5
6
Frequency
13
12
10
13
10
14
Draw a histogram to summarize this data.
Solution: First, we
Name:
Math 1011 Intro to Statistics
Summer 2012
Experiment Design
6/11/12
1. A study was performed to see if Vitamin C aids in prevention and curing the common cold. A
randomized, controlled, double blind study was performed with the particpants broken i
Name:
Student ID:
Math 1011 Intro to Statistics
Summer 2012
Final Exam
Show all work. Answers without work will receive no credit. You may use any non-graphing
calculator. There are 10 questions worth 10 points each. You may (and are encouraged to) leave
Name:
Student ID:
Math 1011 Intro to Statistics
Summer 2012
Final Exam
Show all work. Answers without work will receive no credit. You may use any non-graphing
calculator. There are 10 questions worth 10 points each. You may (and are encouraged to) leave
Name:
Student ID:
Math 1011 Intro to Statistics
Summer 2012
Exam 2
Show all work. Answers without work will receive no credit. You may use any non-graphing
calculator. There are 8 questions worth 12 points each. To obtain the nal 4 points, write in the up
Name:
Student ID:
Math 1011 Intro to Statistics
Summer 2012
Exam 2
Show all work. Answers without work will receive no credit. You may use any non-graphing
calculator. There are 8 questions worth 12 points each. To obtain the nal 4 points, write in the up
Name:
Student ID:
Math 1011 Intro to Statistics
Summer 2012
Exam 1
Show all work. Answers without work will receive no credit. You may use any non-graphing
calculator. There are 8 questions worth 12 points each, except for number 4, which is worth 16 poin
Name:
Student ID:
Math 1011 Intro to Statistics
Summer 2012
Exam 1
Show all work. Answers without work will receive no credit. You may use any non-graphing
calculator. There are 8 questions worth 12 points each, except for number 4, which is worth 16 poin