A Random Sample of N = 4 Scores Is Obtained

question 46

Multiple Choice

A random sample of n = 4 scores is obtained from a normal population with µ = 30 and σ = 8.What is the probability that the sample mean will be smaller than M = 22?

• A)0.00003
• B)0.0228
• C)0.1587
• D)0.3085

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Definitions:

Chromosomes

Thread-like structures located inside the nucleus of animal and plant cells, made of protein and a single molecule of DNA, which carries genetic information.

DNA

A molecule known as deoxyribonucleic acid, it is crucial for conveying genetic guidelines necessary for the growth, maturation, function, and reproduction of every known living organism and a wide array of viruses.

Nucleus

An organelle found in eukaryotic cells that contains most of the cell's genetic material.

Gene

Functional unit of heredity. Each gene occupies a specific place, or locus, on a chromosome; it is capable of reproducing itself exactly at each cell division; it often is capable of directing the formation of an enzyme or another protein.