The Authors of Your Textbook Discussed a Study on Teaching

question 8

Multiple Choice

The authors of your textbook discussed a study on teaching practices in which their two classes where communicating with one another and influenced the results of the study.In this scenario, which of the following was a threat to internal validity?

• A)attrition
• B)testing
• C)diffusion of treatment
• D)instrumentation

---

Definitions:

Gross Margin

A company's total sales revenue minus its cost of goods sold (COGS), divided by total sales revenue, expressed as a percentage.

Fixed Costs

Expenses that do not change with the level of goods or services produced by a business, such as rent, salaries, and insurance premiums.

Sales Increase

A rise in the number of products or services sold, often indicating a growth in a company's business activities and revenue.

Risk/Reward Tolerance

An individual's or entity’s capacity to assume risk with the expectation of receiving a corresponding return, balancing between potential gains and losses.