Exhibit 3-2 A Researcher Has Collected the Following Sample Data

question 140

Multiple Choice

Exhibit 3-2
A researcher has collected the following sample data
5 12 6 8 5
6 7 5 12 4
-Refer to Exhibit 3-2. The 75th percentile is

• A)5
• B)6
• C)7
• D)8

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Definitions:

T Distribution

A family of probability distributions that can be used to develop an interval estimate of a population mean whenever the population standard deviation s is unknown and is estimated by the sample standard deviation s.

Variance

A measure of the spread between numbers in a data set, indicating how much the numbers differ from the mean.

Independent Samples

Samples drawn from different populations without any pairing or matching between the samples.

Normal Distribution

A distribution of probability that reflects symmetry around the mean, illustrating that occurrences near the mean are more common than those further away from it.