Scores on a Test Have a Mean of 73 And Q

question 167

Multiple Choice

Scores on a test have a mean of 73 and $Q _ { 3 }$ is 80. The scores have a distribution that is approximately normal.
Find P90. (You will need to first find the standard deviation.)

• A)86.4
• B)85.7
• C)86.8
• D)85.3

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Definitions:

Observations

Data collected during the course of a scientific study or experiment.

Variables

Elements, features, or factors that are likely to vary or change within the context of a study or experiment.

Descriptive Statistics

Statistical methods used to summarize and describe the main features of a data set, such as mean, median, and mode.

Descriptive Statistics

Descriptive statistics involve summarizing and organizing data so it can be understood and presented in a simpler form, including measures of central tendency and variability.