Business

BUSINESS STATISTICS: TUTORIAL 1

UNIT 1: INTRODUCTION TO STATISTICS

Exercises

1. 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.

a. Number of telephones per household

b. Length of the longest long-distance call made per month

c. Whether someone in the household owns a cell phone.

d. Whether there is a high-speed internet connection in the household.

2. 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.

a. Name of the Internet Service Provider

b. Amount of time spent surfing the Internet per week

c. Number of emails received in a week

d. Number of online purchases made in a month

3. An online survey of almost 53,000 people indicated that 37% decide what to make for dinner at home at the last minute and that the amount of time to prepare dinner averages 12 minutes, while amount of time to cook dinner averages 28 minutes.

a. Which of the four categories of data sources do you think were used in this study?

b. Name a categorical variable discussed in this article.

c. Name a numerical variable discussed in this article.

4. A manufacturer of dog food was planning to survey households in China to determine the purchasing habits of dog owners. Among the questions to be included are those that relate to

1. Where dog food is primarily purchased

2. Whether dry or moist dog food is purchased

3. The number of dogs living in the household

4. Whether the dog is pedigreed.

a. Describe the population

b. For each of the four items listed, indicate whether the variable is categorical or numerical. If it is numerical, is it discrete or continuous?

c. Develop three...