C207 Module 1 Quiz

For companies to attract and retain their best customers, they need a complete portrait of who they are. What do companies use to develop this portrait?

Histograms

Analytics

Management science

Statistics

Analytics

Correct. Extensive use of statistical and quantitative analysis that drives decisions and add value helps provide a complete picture of a company.

A manufacturer wants to maximize their factory output while specifically minimizing labor costs. What type of analytics might they employ to achieve this goal?

Predictive analytics

Descriptive analytics

Diagnostic analytics

Prescriptive analytics 

Prescriptive analytics

Correct. Using data to determine the best possible decision to pursue will assist in optimizing the labor costs.

What type of data error that occurs in measurement is constant within a data set and is sometimes caused by faulty equipment or bias?

Omission

Random

Systematic

Outlier

Systematic

Correct. Systematic errors are created by the measurement device or process used to collect data.

An Educator develops a new standardized test to measure math skills of ninth graders. She has students in her home state of Ohio take the test. If the test is to be used on a national level, what type of error might be found in her data?

Systematic error

Omission error

Information bias

Measurement bias

Measurement Bias

Correct: In measurement bias the sample is not representative of the population and it may not accurately measure the math skills of students from different regions.

A city government is trying to determine the national origins of its recent immigrant population. If a survey of the immigrant population is conducted in English what type of error might be present in the data?

Random

Outlier

Omission

Accuracy

Omission

Correct. Conducting the survey in English could lead to omission errors if certain immigrant groups who do not speak English are not included in the survey, resulting in a biased or incomplete representation of the national origins of the immigrant population.

The use of Big Data is increasing important to businesses in competitive markets. Which of the following characteristics is not true of big data?

Contains unstructured data

Can be analyzed with traditional spreadsheets

Requires the use of analytics

Contains structured data

Can be analyzed with traditional spreadsheets

Correct: Big data requires specialized software to analyze due to its volume, variety, and complexity.

The Davenport-Kim three-stage model consists of framing the problem, solving the problem, and communicating results. Which two of the following are part of framing the problem stage?

Choose 2 answers.

Determine the scope of the problem

Data collection

Review of previous findings

Presenting a recommendation

Determine the scope of the problem

Review of previous findings

Correct: A broad view of the problem including key factors to investigate is a crucial part of framing the problem.

Correct: Review of past research provides ideas and structure for the current analysis

A healthcare provider is researching blood glucose levels before and after exercising. What two elements should be part of experimental study?
Choose 2 answers.

Treatment procedures

Patient observation

Statistical validity

Experimental response

Treatment procedures

Experimental response

Correct: Defining the treatments applied to each subject is an important element in experimental studies.

Correct: Measuring the responses of the experimental treatments is an essential part of an experimental study.

Runners cover 26.2 miles in the Olympics marathon. What level of measurement is this?

Ratio

Ordinal

Nominal

Interval

Ratio

Correct: Ratio level of measurement is continuous data with a unique zero point that allows multiplication and division.

Which level of measurement is the type of cars produced in a Ford factory?

Nominal

Interval

Ordinal

Ratio

Nominal

Correct: The type of car produced in a Ford Factory is categorical data in no specific order.

Which level of measurement is the 10 best cities in the United States to retire in?

Ratio

Ordinal

Nominal

Interval

Ordinal

Correct: The 10 best cities in the United States to retire in is categorical data in a specific order.

Which level of measurement are women’s dress sizes (e.g., 0, 2, 4, 6)?

Ratio

Ordinal

Nominal

Interval

Interval

Correct: Numerical measurements that are equal distance apart and do not have a natural zero point. Women’s dress sizes are intervals.

A local school board is studying the impact of a proposed change in testing on math scores. Bias can be introduced into the study by both students and teachers. Which research technique would eliminate this type of bias?

Double-blind study

Blind study

Cohort study

Observation study

Double blind study

Correct: A double-blind study is designed to eliminate bias by ensuring that neither the participants (students and teachers) nor the researchers know who is receiving the treatment or intervention, thus preventing any influence on the results.

A Company's product development team test 3 new car waxes by waxing 5 cars with each wax and then running them through a car wash. They then record number of waxes it takes before the wax begins to deteriorate. What is the term for the five cars waxed with each wax and then run through a car wash?

The treatment

The construct validity

The response

The experimental unit

The experimental unit

Correct: The five cars are the subjects or objects under observation.

An online retailer selling workout apparel has a large increase in sales during December and declares that its weekly newspaper ad resulted in higher sales.

Which misuse of statistics may the retailer have used in making this decision?

Small sample size

Association and causation

Missing data

Conscious bias

Association and causation

Correct. the retailer is assuming that the newspaper ad caused the increase in sales without considering other factors that could have contributed to the rise, such as seasonal demand during December.

An educator collects eighth-grade math scores from a local school and uses this data to recommend curriculum changes for grades 8–12.

Which misuse of statistics may the educator have used in making this recommendation?

Lack of blinding

Conscious bias

Missing data

Not a representative sample

Not a representative sample

Correct. The sample of 8th grade math scores is not representative of the population of 8-12th grade.