BSTAT REVIEW

Which of the following variables is an example of a categorical variable?

 

•   The amount of money you spend on eating out each month.

• The time it takes you to write a test.

• The geographic region of the country in which you live.

• The weight of a cereal box.

A measurement scale that rates product quality as either 1 = poor, 2 = average and 3 = good is known as

• nominal

• ordinal

• interval

• ratio

Which of the following is not a goal of descriptive statistics?

• Summarizing data

• Displaying aspects of the collected data

• Reporting numerical findings

• Estimating characteristics of the population

Which of the following are not typical uses of inferential statistics?

• Develop forecasts

• Summarize data

• Provide estimates

• Make predictions

A researcher used a procedure to select a sample of n objects from a population in such a way that each member of the population is chosen strictly by chance, is equally likely to be chosen, and every possible sample of size n has the same chance of selection. The procedure used by the researcher is known as:

• descriptive statistics

• inferential statistics

• simple random sampling

• None of the above

Consider  the  terms:  information,   data,   and  knowledge. From a statistical standpoint, list these terms in order of increasing usefulness in making decisions.

• Information, data, and knowledge

• Data, information, and knowledge

• Knowledge, information, and data

• Knowledge, data, and information

Inferential statistics is a process that involves all of the following except:

• estimating a sample statistic

• estimating a population parameter

• testing a hypothesis

• Both A and B

Suppose a survey is taken of 300 high school seniors. This group is probably a

• sample

• population

• system

• process

When data are collected in a statistical study for only a portion or subset of all elements of interest the researcher is using a:

• sample

• parameter

• statistic

• population

Which of the following is a quantitative variable?

• The make of a washing machine

• A person's gender

• Price of a car in thousands of dollars

• Whether a person is a college graduate or not