Exam 1: What Is Statistics

A company was studying the demographics of their customers. As part of the study they collected the following variables: gender, marital status, credit rating (low, medium, high), annual income, and age. Label the variable annual income as qualitative or quantitative, discrete or continuous, and nominal, ordinal, interval, or ratio.

What type of data is the number of litres of gasoline pumped by a filling station during a day?

A company was studying the demographics of their customers. As part of the study they collected the following variables: gender, marital status, credit rating (low, medium, high), annual income, and age. Label the variable credit rating as qualitative or quantitative, discrete or continuous, and nominal, ordinal, interval, or ratio.

A marketing class of 50 students evaluated the instructor using the following scale: superior, good, average, poor, and inferior. The descriptive summary showed the following survey results: 2% Superior, 8% good, 45% average, 45% poor, and 0% inferior.

What level of measurement is a bar code?

A company was studying the demographics of their customers. As part of the study they collected the following variables: gender, marital status, credit rating (low, medium, high), annual income, and age. Label the variable age as qualitative or quantitative, discrete or continuous, and nominal, ordinal, interval, or ratio.

What type of data is the amount of income tax that you have paid?

A questionnaire contained a question regarding marital status. The respondent checked either single, married, divorced, separated or widowed. What is the scale of measurement for this question?

The principal difference between the interval and ratio scale of measurement is that the ratio scale has a _____________________.

Which word is NOT part of the definition of descriptive statistics?

A bank asks customers to evaluate the drive-thru service as to good, average, or poor. Which level of measurement is this classification?

A company was studying the demographics of their customers. As part of the study they collected the following variables: gender, marital status, credit rating (low, medium, high), annual income, and age. Which three variables are considered to be qualitative rather than quantitative?

Qualitative variables are also referred to as a(n)_______ .

Nominal data requires that the categories be_____________ and__________.

The general process of gathering, organizing, presenting, analyzing, and interpreting data to assist in making more effective decisions is called

(i) If we select 100 persons out of 25,000 registered voters and question them about candidates and issues, the 100 persons are referred to as the population. (ii) The order that runners finish in a race would be an example of continuous data. (iii) Another name for inductive statistics is descriptive statistics.

The prime rate of interest is an example of a(n)_______ level of measurement.

Colleen Waite, Director of General Canadian Sales, is concerned by a downward sales trend. Specifically, their customer base is stable at 2,200, but they are purchasing less each year. She orders her staff to search for causes of the downward trend by selecting a focus group of 50 customers.

The members of each basketball team wear numbers on the back of their jerseys. What scale of measurement are these numbers considered?

The collection of all possible objects of interest is referred to as the________ .