# QMS 102 Study Guide - Midterm Guide: Interquartile Range, Taco Bell, Antivirus Software

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24 Nov 2012
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For Questions 1 to 6, refer to the following information
The following data show the lowest round-trip airfares (per person) departing
Toronto in June 2012, which was advertised at http://www.GreatFlightCentre.ca
Destination city Round-trip airfare (per
person) before tax (\$)
Tax (\$)
Cancun 95 287
Orlando 99 225
Punta Cana 325 330
Holguin 355 220
Panama 344 245
Manchester 349 410
Birmingham 349 408
Frankfurt 399 337
Rome 399 315
Las Vegas 519 245
Paris 544 363
Sydney 840 247
Bangkok 1258 365
Hong Kong 1799 266
Taipei 1999 230
Tokyo 799 378
Question 1
Compute the sample coefficient of variation for “the round-trip airfares (per person)
before tax’’
Question 2.
Which measures of central tendency would be a better measure, mean or median, to
represent the data on the “The round-trip airfares (per person) before tax’’?
Question 3.
Which destination city has the 62th percentile round-trip airfare (per person) before tax?
Question 4.
Use “The round-trip airfares (per person) before tax” data for answering the following
data.
Calculate
a. The mode
b. The sample standard deviation
c. The interquartile range
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Question 5.
The following table shows a sample data regarding the 5 Fast Food chains in Toronto.
Fast Food
Chains
Number of Stores Sales per store (\$1000) Total Profit (\$1000)
Qopeye 2 1258 1500
Mentucky 5 974 800
McMonald 3 485 4500
B &W 4 763 2600
Paco Bell 3 469 3900
a. What is the mean profit per store?
b. What is the overall average sales per store?
c. What is the mean profit per chain?
d. What is the overall average sales per chain?
Question 6.
In July 2011, a sample of 18 organic coffee shops in Toronto charged the following
amounts, in dollars, for a large cup of coffee (including tax). The following stem-and-
leaf display shows the large coffee prices ranged from \$4.12 to \$4.48.
Large Coffee Prices (in dollars)
Stems Leaves
4.1 233
4.1 68889
4.2 034
4.2 68
4.3
4.3 89
4.4
4.4 678
Determine
a. The median coffee price
b. the 30th percentile coffee price
c. the 86th percentile coffee price
Question 7.
In a survey the respondent is asked to report the number of siblings. The scale of
measurement used is:
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A. Nominal
B. Interval
C. Ratio
D. Ordinal
E. None of the above
Question 8.
A questionnaire asks the respondent to report the color of his/her laptop. The scale of
measurement of the response data is:
A. Nominal
B. Interval
C. Ratio
D. Ordinal
E. None of the above
Question 9.
McAfee
AVG 8.0
AVG 8.1 or higher
Norton 4.0
None of the above
Refer to the question above being asked on the survey form by Ryerson University.
What is the measurement scale of the response data?
A. Ordinal
B. Interval - Continuous
C. Ratio – Discrete
D. Ratio – Continuous
E. Nominal
For Questions 10 to 16, refer to the following information
The following information is regarding the final exam result for CQMS204 in Fall 2011
Minimum 9
First Quartile 37
Second Quartile 51
Interquartile Range 28
Mean 51
3
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