Two Independent Simple Random Samples Are Taken to Test the Difference

question 62

Multiple Choice

Two independent simple random samples are taken to test the difference between the means of two populations whose variances are not known, but are assumed to be equal. The sample sizes are n₁ = 31 and n₂ = 40. The correct distribution to use is the t distribution with _____ degrees of freedom.

• A) 73
• B) 72
• C) 71
• D) 69

---

Definitions:

Interest

The charge for borrowing money or the return on investment for lending money, typically expressed as a annual percentage rate.

Investments

Funds committed into ventures with the expectation of earning a return or profit.

Withdraw

To withdraw means to take out funds from an account, remove participation in an activity, or retract from a position or commitment.

Retire

To withdraw a financial instrument from circulation, or for an individual to leave the workforce and cease employment.