The Sample Size Needed to Provide a Margin of Error

question 27

Multiple Choice

The sample size needed to provide a margin of error of 3 or less with a .95 probability when the population standard deviation equals 11 is

• A) 10.
• B) 11.
• C) 51.
• D) 52.

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Definitions:

[H+]

The concentration of hydrogen ions in a solution, often used as a measure of the acidity of a solution, with lower values indicating higher acidity.

HBr

Hydrobromic acid, a strong acid formed by dissolving hydrogen bromide in water.

[H+]

[H+] denotes the concentration of hydrogen ions in a solution, which is a measure of the acidity or alkalinity (pH) of the solution.

K

The chemical symbol for Potassium, a soft, silver-white metal belonging to the alkali metal group of the periodic table.