The Population of Lengths of Aluminum-Coated Steel Sheets Is Normally

question 30

Multiple Choice

The population of lengths of aluminum-coated steel sheets is normally distributed with a mean of 30.05 inches and a standard deviation of .2 inches. What is the probability that a sheet selected at random from the population is between 29.75 and 30.5 inches long?

• A) .4332
• B) .4878
• C) .0546
• D) .9210

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Definitions:

Population Mean

The average value of all observations or measurements in a given population.

Random Sample

A subset of a population selected in a manner that ensures each member has an equal chance of being chosen.

News Narrative

The way news stories are structured and presented to convey a particular perspective or theme.

P-value

The probability of obtaining test results at least as extreme as the results actually observed, under the assumption that the null hypothesis is true.