TABLE 10-10 A Corporation Randomly Selects 150 Salespeople and Finds That 66

question 15

Multiple Choice

TABLE 10-10
A corporation randomly selects 150 salespeople and finds that 66% who have never taken a self-improvement course would like such a course. The firm did a similar study 10 years ago in which 60% of a random sample of 160 salespeople wanted a self-improvement course. The groups are assumed to be independent random samples. Let π₁ and π₂ represent the true proportion of workers who would like to attend a self-improvement course in the recent study and the past study, respectively.
-Referring to Table 10-10, if the firm wanted to test whether a greater proportion of workers would currently like to attend a self-improvement course than in the past, which represents the relevant hypotheses?

• A) H₀: π₁ - π₂ = 0 versus H₁: R₁ - π₂ ≠ 0
• B) H₀: π₁ - π₂ ≠ 0 versus H₁: R₁ - R₂ = 0
• C) H₀: π₁ - π₂ ≤ 0 versus H₁: R₁ - R₂ > 0
• D) H₀: π₁ - π₂ ≥ 0 versus H₁: R₁ - R₂ < 0

---

Definitions:

Probability Distribution

A computation in statistics identifying each possible outcome and its probability for a random variable within a specified range.

Investment's Risk

The potential for losing money or not achieving the expected return on an investment due to various factors like market volatility.

Distribution of Returns

The way in which the earnings from an investment are paid out or reinvested.

Portfolio's Value

The total worth of all the investments held in an individual's or entity's investment portfolio.