Suppose That We Know That the Sample Mean Is 18

question 7

Multiple Choice

Suppose that we know that the sample mean is 18 and the population standard deviation is 3. We want to test the null hypothesis that the population mean is 20. In this situation we would

• A) reject the null hypothesis at a = .05.
• B) reject the null hypothesis at a = .01
• C) retain the null hypothesis.
• D) We cannot solve this problem without knowing the sample size.

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Definitions:

Vector DNA

Vector DNA refers to a molecule of DNA, such as a plasmid or virus, used to transfer genetic material into a cell in genetic engineering processes.

DNA Ligase

An enzyme that facilitates the joining of DNA strands together by catalyzing the formation of a phosphodiester bond.

DNA Polymerase

An enzyme that synthesizes DNA molecules from deoxyribonucleotides, the building blocks of DNA.

RNAi

Short for RNA interference, it is a biological process in which RNA molecules inhibit gene expression or translation, by neutralizing targeted mRNA molecules.