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tmp 20304 BQT173 Tutorial 1347810451

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Text Preview EQT173 BUSINESS STATISTICS
Semester II 2014/2015
Tutorial 1
1) What is the difference between a sample and a population? 2) What is the difference between a statistic and a parameter? 3) What is the difference between descriptive and inferential statistics? 4) What is the difference between a categorical variable and a numerical variable? 5) What is the difference between a discrete variable and a continuous variable? 6) What is an operational definition and why is it so important?

7) What are the four levels of measurement scales?
8) Three different beverages are sold at a fast food restaurant soft drinks, tea, and coffee. a) Explain why the type of beverage sold is an example of a categorical variable. b) Explain why the type of beverage sold is an example of a nominal scaled variable. 9) Soft drinks are sold in three sizes at a fast-food restaurant small, medium, and large. Explain why the size of the soft drink is an example of an ordinal scaled variable. 10) Suppose that you measure the time it takes to download an MP3 file from the Internet. a) Explain why the download time is a continuous numerical variable. b) Explain why the download time is a ratio scaled variable. 11) The following information is collected from students upon exiting the campus bookstore during the first week of classes:

a)
b)
c)
d)

Amount of time spent shopping in the bookstore
Number of textbooks purchased
Academic major
Gender

Classify each of these variables as categorical or numerical. If the variable is numerical, determine whether the variable is discrete or continuous. In addition, determine the level of measurement for these variables.

12) For each of the following variables, determine whether the variable is categorical or numerical. If the variable is numerical, determine whether the variable is discrete or continuous. In addition, determine the level of measurement for each of the following. a)

b)
c)
d)

Name of Internet provider
Amount of time... Show More

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