DrCrandall Wants to Use the Scientific Method to Test Whether

question 322

Multiple Choice

Dr.Crandall wants to use the scientific method to test whether caffeine improves cardiovascular endurance in male athletes.What is the first thing that he should do?

• A) Observe male athletes doing cardiovascular workouts after having consumed caffeine or not.
• B) Develop hypotheses about caffeine consumption and cardiovascular endurance.
• C) Randomly give half of the male athlete's caffeine and the other half no caffeine and then test their cardiovascular endurance.
• D) Build a theory about caffeine's effect on the cardiovascular system.

---

Definitions:

Cash Sales

Cash sales refer to transactions where payment is made in full with cash at the time of the sale, without any credit.

Cheque Processing Time

The period it takes from when a cheque is issued until the funds are available in the payee’s account, reflecting bank processing durations.

Trade Discount

A reduction in the listed price of a product or service offered by sellers to buyers in the business-to-business sales.

Break-Even Default Rate

The rate at which the losses from defaulted loans equal the income generated from interest payments in a lending portfolio.