If Two Random Samples of Sizes 30 and 36 Are $\bar { X } _ { 1 } - \bar { X } _ { 2 }$

question 99

Multiple Choice

If two random samples of sizes 30 and 36 are selected independently from two populations with means 78 and 85, and standard deviations 12 and 15, respectively, then the mean of the difference $\bar { X } _ { 1 } - \bar { X } _ { 2 }$ is equal to:

• A)-7
• B)7
• C)(78 - 85) / (30 -36) = 1.17
• D)78/30 - 85/36 = 0.24

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Common Stock

Common stock represents ownership shares in a corporation, giving holders voting rights and the potential to receive dividends.

Long-term Investment

Investments held for an extended period, typically more than one year, with the intention of earning returns over time.

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Dividends declared and owed to a shareholder but not yet paid.

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Income received from owning shares in a company, typically distributed from the company's profits.