STT 201
Exam 3: Example Multiple Choice Questions
15. The actual proportion of all adult Americans who use a form of alternative medicine
is 0.57 (57%). In the spring 1994 issue, Self magazine reported that in a mailin poll by
700 readers, 84% (588 out
STT 200 Due on 02 / 10 / 2015
Name PID
Homework 1
1. In May 2007, George W. Bush’s approval rating stood at 30% according to a CBS News/New York
Times national survey of 1125 randomly selected adults.
Identify the population, the sample, and the variabl
STT 201 Quiz 11
Solutions
Each quiz had 5 of the following problems.
1. A researcher models the length of human pregnancies using a normal distribution with mean and
population standard deviation = 16 days. How many pregnant women would he need in a study
STT 201 Quiz 12 (November 28, 2001)
Solutions
The quizzes contained the following 5 problems.
1. A researcher collected n = 25 observations to test H0 : = 2 versus Ha : = 2. The sample mean of
his 25 observations was 1.90 and the sample standard deviation
STT 201 Quiz 10 (November 7, 2001)
Solutions
All the quizzes had 5 of the following problems, not necessarily in the same order.
1. A 90% condence interval for a population mean was computed to be 56 1.64 (7/ 15). What is
the margin of error of this inter
STT 201 Quiz 6 (October 9, 2001)
Solutions
1. For two events E and F , P (E) = 0.09, P (F ) = 0.08, and P (E and F ) = 0.0072. Are E and F
independent?
(a) Yes
(b) No
(c) There is not enough information to decide.
Solution. We know that events E and F are
STT 201 Quiz 13 (December 5, 2001)
Solutions
Next two questions: A random sample of 14, 348 people were followed for about four years. They were
classied based on their scores on a test of sudden anger (low, moderate, high) and whether they had coronary
h
STT 201 Quiz 9 (October 31, 2001)
Solutions
The rst 4 questions refer to the following. A CNN/USA Today/Gallup poll of 1006 randomly selected
homeowners asked Will you or someone in your family be giving out Halloween treats from the door of your
home on
STT 201
EXAM 1 (BlueForm2)
NAME (in block letters):
Sept. 2012
SIGNATURE:
This is a CLOSEDBOOK exam. Answer ALL questions. Choose ONE best answer.
There are 25 questions in all. Each question carries two points.
Maximum Points = 50.
Duration = 60 minutes
STT 201 Quiz 2 (September 12, 2001)
Solutions
Each quiz contained 4 questions from the 8 questions below.
1. Compute the standard deviation of these 5 numbers: 1, 3, 2, 5, 4.
(a) The standard deviation is 2.5.
(b) The standard deviation is 1.25.
(c) The s
STT 201 Quiz 3 (September 19, 2001)
Solutions
1. A group of 356 male federal employees were classied according to their socioeconomic status (SES)
with categories High, Middle, and Low, and their smoking status. The data are summarized in the
following co
STT 201 Quiz 5 (October 2, 2001)
Solutions
Your quiz contained 7 of the following 8 questions.
1. This question and the next question refer to the following scenario: Noah needs to nd two armadillos
for his ark, hopefully one male and one female. He encou
STT 201 Quiz 7 (October 17, 2001)
Solutions
1. Here is a stem and leaf plot of the number of home runs Babe Ruth hit each year during the 1920
through 1934 seasons.
2
3
4
5
6





25
45
1166679
449
0
Choose the best answer.
(a) Babe Ruth hit 46 home
STT 201 Quiz 4 (September 26, 2001)
Solutions
The rst four questions on the quiz refer to the following scenario: A study measured the average weekly
expenditure on alcoholic beverages (Y) and the average weekly expenditure on tobacco (X) for 11 regions o
STT 201 Quiz 1 (September 5, 2001): Solutions
Each quiz contained 4 problems from the 7 problems given here.
1. A researcher is interested in the eects of radiation from cellular phones on pregnant women. He puts
an advertisement in the student newspaper
STT 201 Quiz 8 (October 24, 2001)
Solutions
Your quiz had 5 of the following questions. Note that there was an error in the answers to all the ll in
the blank questions, so these were not graded. In the solutions, the letter Z always represents a standard