Question 1

A method of gathering data when individuals are paid to discuss their attitudes towards products or services in a group setting controlled by a moderator is known as --------.

Accepted Answer

Focus groups involve gathering individuals to discuss their attitudes towards products or services in a controlled setting, often with a moderator guiding the discussion. This method is used to collect qualitative data.

Question 2

Using income data to determine the credit worthiness of a consumer who wishes to purchase a new car is an example of using statistics in the field of ------- .

Accepted Answer

Finance professionals often use income data and other financial statistics to assess the creditworthiness of individuals or entities. This process helps in determining whether the consumer can afford the loan for a new car, influencing lending decisions.

Question 3

A property of------- data is that the differences between categories are not meaningful and, therefore, cannot be measured.

Accepted Answer

Ordinal data is characterized by the fact that while the data can be ordered or ranked, the differences between the data points do not hold any meaningful value. This means that we can say one value is higher or lower than another, but we cannot quantify the difference between them accurately.

Question 4

--------data use descriptive terms to measure or classify something of interest.

Accepted Answer

Qualitative data use descriptive terms to measure or classify something of interest, focusing on characteristics, descriptions, and attributes rather than numerical values.

Question 5

Bridgestone would like to estimate the average tread life of a particular brand of automobile tire. Fifty customers who have purchased this tire are sampled and asked about the tread life of their tires. This is an example of using------ .

Accepted Answer

This is an example of using inferential statistics because Bridgestone is collecting data from a sample (fifty customers) to make inferences or draw conclusions about the average tread life of the tire for the entire population of customers who use it.

Question 6

In a Major League Baseball game today, the Philadelphia Phillies scored six runs against the New York Mets. This is an example of -------- data.

Accepted Answer

The number of runs scored in a baseball game is an example of ratio data because it has a meaningful zero point (zero runs means no runs were scored) and the differences between values can be compared meaningfully (scoring 6 runs is twice as many as scoring 3 runs).

Question 7

Which levels of measurement are considered quantitative data?

Accepted Answer

Interval and ratio levels of measurement are considered quantitative because they both deal with numbers where you can perform meaningful arithmetic operations. Interval data have meaningful differences between measurements but no true zero point, while ratio data have both meaningful differences and a true zero, allowing for a full range of quantitative operations.

Question 8

A respondent of a survey indicates that she is currently in her junior year at the University of Texas. This is an example of _____ _ data.

Accepted Answer

The respondent indicating she is in her junior year at the University of Texas is an example of ordinal data because it reflects a rank order (freshman, sophomore, junior, senior) without specifying the exact difference in years between these categories.

Question 9

Which levels of measurement are considered qualitative data?

Accepted Answer

Nominal and ordinal levels of measurement are considered qualitative because they categorize or order data without indicating exact differences in quantity. Nominal data classify without any order, while ordinal data classify with a sense of order but without a consistent scale of difference between categories.

Question 10

The proportion of customers that rate their latest airline experience as "excellent" is an example of -------.

Accepted Answer

The proportion of customers rating their latest airline experience as "excellent" is an example of descriptive statistics because it summarizes data from a sample, providing a snapshot of how customers perceive their experience.

Question 11

A _____ is a portion of a population that is representative of the population from which it is selected.

Accepted Answer

A sample is a subset of a population that is used to represent the entire group as a whole, allowing researchers to study and make inferences about the population based on the characteristics of the sample.

Question 12

Using quality control techniques to test the salt content of pretzels before they are packaged for the consumer is an example of using statistics in the field of ______ .

Accepted Answer

Quality control techniques, such as testing the salt content of pretzels, fall under the domain of operations, as they are directly related to the production and delivery of goods and services.

Question 13

According to climate data recorded since 1884, the average annual snowfall in Philadelphia is 22.3 inches. This value is an example of------- .

Accepted Answer

The average annual snowfall in Philadelphia is an example of descriptive statistics because it summarizes a large amount of data (snowfall records since 1884) into a single number (average), which describes a specific aspect of the dataset.

Question 14

A method of gathering data while the subjects of interest are in their natural environment, often unaware they are being watched, is known as ____ .

Accepted Answer

Direct observation involves watching subjects in their natural environment without their awareness that they are being observed. This method is used to gather data in a way that is unobtrusive and does not influence the subjects' behavior.

Question 15

A respondent of a survey indicates that he owns the home that he currently resides. This is an example of ------- data.

Accepted Answer

This is an example of nominal data because it categorizes the respondent into a group (homeowners) without implying any order, distance, or relative magnitude between the categories.

Question 16

-------data are values that correspond to specific measurements taken over a range of time periods.

Accepted Answer

Time series data are values that correspond to specific measurements taken over a range of time periods, such as daily stock market prices, monthly rainfall, or yearly sales figures.

Question 17

A _ _____ represents all possible subjects of interest.

Accepted Answer

A population represents all possible subjects of interest, encompassing the entire group that is the focus of a statistical analysis.

Question 18

--------data are values collected from a number of subjects (firms, individual, states, regions, and so forth)during a single time period.

Accepted Answer

Cross-sectional data refer to data collected from various subjects (such as firms, individuals, states, or regions) at a single point in time, contrasting with time series data, which are collected from the same subject across multiple time periods.

Question 19

General Mills is considering offering a new type of yogurt. To gauge interest, they are performing taste tests at different locations around the country. Based on the results of these samples, they will decide whether or not to market the new yogurt. This is an example of using ------.

Accepted Answer

Inferential statistics are used to make predictions or inferences about a population based on a sample of data. In this case, General Mills is using the results from taste tests (a sample) to make a decision about marketing the new yogurt to the broader population.

Question 20

A ---------- sample does not represent the intended population and can lead to distorted findings.

Accepted Answer

A biased sample is one that does not accurately represent the population from which it is drawn, leading to skewed or inaccurate results. Random, stratified, and probability samples are methods designed to reduce bias and ensure representativeness.

Quiz 1: Healthy Change