If We Are Testing for the Difference Between the Means

question 47

Multiple Choice

If we are testing for the difference between the means of 2 related populations with samples of n₁ = 20 and n₂ = 20, the number of degrees of freedom is equal to

• A) 39.
• B) 38.
• C) 19.
• D) 18.

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Definitions:

Coins

Pieces of metal issued by the government as money, typically used as lower-value currency.

Barter

An exchange system where goods or services are directly exchanged for other goods or services without using a medium of exchange, such as money.

Commodity Money

A type of money whose value comes from a commodity of which it is made, such as gold or silver.

Goldsmiths

Historical tradespeople who crafted objects out of gold and were also involved in banking activities, such as issuing loans and safekeeping valuables.