STAB22 Past Midterm solutions 07

UNIVERSITY OF TORONTO SCARBOROUGH
Department of Computer and Mathematical Sciences

STAB22H3 Statistics I
Duration: 1 hour and 45 minutes


Last Name: First Name:

Student number:

Aids allowed:

- One handwritten letter-sized sheet (both sides) of notes prepared by you

- Non-programmable, non-communicating calculator


Standard normal distribution tables are attached at the end.

This test is based on multiple-choice questions. All questions carry equal weight. On the
Scantron answer sheet, ensure that you enter your last name, first name (as much of it as
fits), and student number (in “Identification”).

Mark in each case the best answer out of the alternatives given (which means the nu-
merically closest answer if the answer is a number and the answer you obtained
is not given.)

Also before you begin, complete the signature sheet, but sign it only when the invigilator
collects it. The signature sheet shows that you were present at the exam.

There are 15 pages including this page. Please check to see you have all the pages.


Good luck!!

, Page 2 of 15

1. In an effort to improve the overall health and well-being of its employees, a large corpora-
tion distributed a written survey to each of its 1400 employees. Data collected included
number of hours worked per week, number of hours spent exercising per week, number of
hours spent enjoying hobbies per week, and number of hours spent with family/friends
per week. Which of the following choices correctly identifies the W’s (Note in this ques-
tion is only interested in three W’s: Who, What and Why. Please identify the choice
that identifies all these three W’s correctly.)
A) Who: The 1400 employees; What: Number of hours spent exercising per week.;
Why: To devise a health club plan
B) Who: The 1400 employees; What: Number of hours worked per week, number
of hours spent exercising per week, number of hours spent enjoying hobbies
per week, and number of hours spent with family/friends per week; Why: To
improve the health and well-being of its employees
C) Who: Large corporations; What: Number of hours worked per week.; Why:
To improve the health and well-being of its employees
D) Who: The 1400 employees; What: Overall job satisfaction; Why: To improve
the health and well-being of its employees
E) Who: A large corporation; What: Overall job satisfaction; Why: To improve
the health and well-being of its employees


Solution: Note: This is question 6 Deveaux quiz bank.Chapter 2 page 3.


2. A study of 2007 model automobiles was conducted. In the study the following variables
were considered: the Region in which the car was manufactured (Europe, North Amer-
ica, Asia); the Type of automobile (compact, midsize, large), volume of the engine
in liters, and the type of Fuel used (regular, premium, 85% Ethanol). The variables
Region, Type, volume, and Fuel are, respectively are:
A) quantitative, categorical, categorical, quantitative.
B) categorical, quantitative, quantitative, categorical.
C) categorical, categorical, quantitative, quantitative.
D) categorical, categorical, quantitative, categorical.
E) Unable to determine without knowing the values of the various variables.

3. Based on data from the National Health Survey, the distribution of weights for adult
males in the U.S. has a mean weight of 173 pounds and a standard deviation of 30
pounds. Suppose the distribution of weights was skewed to the left. The median weight
is one of the following values. Which of the following values is most likely the value of
the median weight?
A) 173 pounds


Question 3 continues on the next page. . .