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:

Acetals

Chemical compounds formed from the reaction between an aldehyde or ketone and a diol, featuring two ether-like oxygen atoms bonded to the same carbon.

PhLi

Phenyllithium, a strong organolithium reagent used in the formation of carbon-carbon bonds in organic synthesis.

NaBH

Likely refers to a sodium borohydride compound, NaBH4, used as a reducing agent in organic chemistry.

MgBr

Likely a shorthand for a magnesium bromide compound, which can act as a Grignard reagent in organic synthesis.