We Sampled 100 Men and 100 Women and Asked: "Do

question 92

Multiple Choice

We sampled 100 men and 100 women and asked: "Do you think the environment is a major concern?" Of those sampled, 67 women and 53 men responded that they believed it is. For the confidence interval procedure to work properly, what additional assumptions must be satisfied?

• A) Both samples were randomly and independently selected from their respective populations.
• B) The population variances are equal.
• C) Both populations have approximate normal distributions.
• D) All of the above are necessary.

---

Definitions:

Fixed Cost

are business expenses that remain constant regardless of the level of production or sales, such as rent or salaries.

Depreciation

The process of allocating the cost of tangible assets over their useful lives, reflecting wear and tear or obsolescence.

Discount Rate

The interest rate used to discount future cash flows to their present value, reflecting the time value of money.