In a Normal Distribution with a Mean of 50 and a Standard

question 23

Multiple Choice

In a normal distribution with a mean of 50 and a standard deviation of 7.5, what is the value of the mode?

• A) 42.5
• B) 50
• C) 57.5
• D) Not possible to determine from the information given.

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Definitions:

Confidence Intervals

An array of values, based on statistics from a sample, which is assumed to enclose the value of an unidentified population feature.

Population Mean

The average value of a characteristic in a population, calculated by summing all the data points and dividing by the number of data points.

Sample Means

The average value of a set of data samples from a population.

Margin of Error

An expression of the amount of random sampling error in a survey's results, indicating how much the survey results might differ from the true population value.