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

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24 Nov 2012

School

Department

Course

Professor

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

Varadero 105 220

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:

2

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.

What is your anti-virus software?

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

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