Create Cumulative Frequency and Relative Frequency Tables
-The Local Police $\begin{array} { l l l l l l l l l l } 44 & 38 & 41 & 50 & 36 & 36 & 43 & 42 & 49 & 48 \end{array}$

question 11

Short Answer

Create Cumulative Frequency and Relative Frequency Tables
-The local police, using radar, checked the speeds (in mph) of 30 motorists in a construction area. The results are listed below. Construct a frequency distribution, a relative frequency distribution, a cumulative frequency distribution, and a relative cumulative frequency distribution using six classes. $\begin{array} { l l l l l l l l l l } 44 & 38 & 41 & 50 & 36 & 36 & 43 & 42 & 49 & 48 \end{array}$
$\begin{array} { l l l l l l l l l l } 35 & 40 & 37 & 41 & 43 & 50 & 45 & 45 & 39 & 38 \end{array}$
$\begin{array} { l l l l l l l l l l } 50 & 41 & 47 & 36 & 35 & 40 & 42 & 43 & 48 & 33 \end{array}$

---

Definitions:

Variable

An element, feature, or factor that is liable to vary or change; it is a characteristic of interest in statistical analysis.

Normal Random Variable

A normal random variable is a variable whose values are distributed according to the normal distribution, characterized by its mean and standard deviation.

Standard Deviation

A statistic that measures the dispersion or variability of a dataset relative to its mean, indicating how spread out the numbers are.

Normally Distributed

Refers to a type of distribution where the data points are symmetrically distributed around the mean, with most observations clustering around the central peak and the probabilities for values further from the mean tapering off equally in both directions.