In a post office, the mailboxes are numbered from 1 to 4,500. these numbers represent

Sample Midterm I

Econ 3790: Business and Economics Statistics

Instructor: Yogesh Uppal

You are allowed to use a standard size [8.5*11] cheat sheet and a simple calculator. Please write all the answers with a

BALL-POINT PEN or an INK PEN. If you have any questions during the exam, please raise your hand. GOOD LUCK!!! I

am sure you guys will do great.

Multiple Choice

Identify the letter of the choice that best completes the statement or answers the question and write it in the space given

next to the question number. Each multiple choice question is worth 1 point.

____ 1. In a questionnaire, respondents are asked to mark their gender as male or female. Gender is an example of the

a. ordinal scale

b. nominal scale

c. ratio scale

d. interval scale

____ 2. Data obtained from a nominal scale

a. must be alphabetic

b. can be either numeric or nonnumeric

c. must be numeric

d. must rank order the data

____ 3. In a post office, the mailboxes are numbered from 1 to 4,500. These numbers represent

a. qualitative data

b. quantitative data

c. either qualitative or quantitative data

d. since the numbers are sequential, the data is quantitative

____ 4. A tabular summary of a set of data showing the fraction of the total number of items in several classes is a

a. frequency distribution

b. relative frequency distribution

c. frequency

d. cumulative frequency distribution

____ 5. A tabular method that can be used to summarize the data on two variables simultaneously is called

a. simultaneous equations

b. crosstabulation

c. a histogram

d. an ogive

Exhibit 1-1

A survey of 800 college seniors resulted in the following crosstabulation regarding their undergraduate major

and whether or not they plan to go to graduate school.

Undergraduate Major

Graduate School Business Engineering Others Total

Yes 70 84 126 280

No 182 208 130 520

Total 252 292 256 800

5.In a post office, the mailboxes are numbered from 1 to 4,500. These numbers representa.categorical datab.quantitative datac.either categorical data or quantitative datad.since the numbers are sequential, the data quantitative

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11.The height of a building, measured in feet, is an example of12.If two groups of numbers have the same standard deviation, then

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a.their means must also be equalb.their medians must also be equalc.their modes must also be equald.None of these alternatives is correct.13.Some hotels ask their guests to rate the hotel's services as excellent, very good, good, and poor. This is an example of the

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Exhibit 1In a recent study based upon an inspection of 200 homes in Daisy City, 80 were found to violate one or more city codes.14.Refer to Exhibit 1. The city manager released a statement that 40% of Daisy City's 2,000 homes are in violation of city codes.The manager's statement is an example of

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Which of the following is an example of categorical data?

Categorical variables represent types of data which may be divided into groups. Examples of categorical variables are race, sex, age group, and educational level.

Which two scales of measurement can be either numeric or nonnumeric?

Variables such as distance, height, weight, and time use the ratio scale. Often referred to as qualitative data, use either the nominal or ordinal scale of measurement, and can be either numeric or nonnumeric.

Which of the following variable uses the interval scale of measurement?

An interval scale is one where there is order and the difference between two values is meaningful. Examples of interval variables include: temperature [Farenheit], temperature [Celcius], pH, SAT score [200-800], credit score [300-850].

Is categorical data always Nonnumeric?

Categorical data use either the nominal or ordinal scale of measurement and may be nonnumeric or numeric.

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