John Conducted an Experiment to Test the Effectiveness of a Smoking

question 38

Multiple Choice

John conducted an experiment to test the effectiveness of a smoking cessation program. The experiment took place over a 1-month time period. Participants in the control group and the experimental group (those who participated in the smoking cessation program) recorded the number of cigarettes that they smoked each day. John was unaware that "national stop-smoking week" also happened to take place during the 1-month time period of his experiment. John's experiment is now confounded by​

• A)maturation.​
• B)history.
• C)regression to the mean.
• D)mortality.

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Definitions:

Cost Of Goods Sold

The direct costs attributable to the production of the goods sold by a company, including the cost of materials and labor.

Accounts Receivable Turnover

A financial ratio that measures how effectively a company collects on its credit sales by comparing net credit sales with the average accounts receivable.

Collection Of Receivables

The process businesses use to pursue payments from customers or clients who have purchased goods or services on credit.

Accounts Receivable

Money owed to a business by its clients or customers for goods or services that have been delivered or used but not yet paid for.