Find the Mean of the Data Summarized in the Given

question 107

Multiple Choice

Find the mean of the data summarized in the given frequency distribution.
-The highway speeds of 100 cars are summarized in the frequency distribution below. Find the mean speed. $$\begin{array} { r | r } \text { Speed (mph) } & \text { Cars } \\\hline 30 - 39 & 3 \\40 - 49 & 17 \\50 - 59 & 51 \\60 - 69 & 16 \\70 - 79 & 13\end{array}$$

• A)59.2 mph
• B)54.5 mph
• C)62.0 mph
• D)56.4 mph

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Definitions:

Positive Relation

A relationship between two variables where an increase in one variable is associated with an increase in the other variable.

Independent Variables

Variables that are manipulated or categorized to determine their effect on the dependent variable.

Standard Deviation

It measures spread or variability around the mean in a data set, highlighting how much variation there is from the average.

Population

The entire set of individuals, items, or data from which a statistical sample is drawn for analysis.