Statistics Chapter 3 Quiz

A graphical display showing the relative position of a distribution's three quartiles as a box on a number line, along with the minimum and maximum values.

Data that are described as a category or label.

Regardless of whether a distribution is bell-shaped, at least 94% of data values will fall within +/- three standard deviations of the mean, and at least 75% of data values will fall within +/- two standard deviations of the mean.

<p>A measure of the standard deviation in terms of its percentage of the mean, useful to compare the degree of variation from one data series to another.</p> Signup and view all the answers

<p>A rule which states that if a distribution follows a bell-shaped, symmetrical curve centered around the mean, approximately 68%, 95%, and 99.7% of the values fall within one, two, and three standard deviations around the mean, respectively.</p> Signup and view all the answers

<p>A list that consists of a distribution's minimum value, first, second, and third quartiles, and maximum value.</p> Signup and view all the answers

<p>The index point, i, marks the middle of the data values and is used to determine the position of the median in the data set.</p> Signup and view all the answers

<p>The difference between the first and third quartiles, corresponding to the data in the middle 50% of the range.</p> Signup and view all the answers

<p>The shape of the distribution when the median is higher than the mean.</p> Signup and view all the answers

<p>A measure of central tendency calculated by adding up all of the values in a data set and dividing by the number of observations.</p> Signup and view all the answers

<p>Measures that use a single value to describe the center point of a data set.</p> Signup and view all the answers

<p>Measures that compare the position of one value in relation to other values in a data set.</p> Signup and view all the answers

<p>Measures that determine how much of a spread there is within a data set.</p> Signup and view all the answers

<p>The value in a data set for which half the observations are higher and half are lower.</p> Signup and view all the answers

<p>The halfway point in a set of data, found by taking the average of the endpoints for each class.</p> Signup and view all the answers

<p>The value that appears most often in a data set.</p> Signup and view all the answers

<p>Values that are much higher or lower than most of the data.</p> Signup and view all the answers

<p>Measures the approximate percentage of values in the data set that are below the value of interest.</p> Signup and view all the answers

<p>Identifies the percentile of a particular value within a set of data.</p> Signup and view all the answers

<p>The approximate percentage of values in the data set that are below the value of interest (where p is any number between 1 and 100).</p> Signup and view all the answers

<p>The first, second, and third quartiles are the 25th, 50th (median), and 75th percentiles.</p> Signup and view all the answers

<p>A measure of variability found by subtracting the lowest value from the highest value in a data set.</p> Signup and view all the answers

<p>The shape of a distribution when the mean is higher than its median.</p> Signup and view all the answers

<p>Measures both the strength and direction of the linear relationship between two variables.</p> Signup and view all the answers

<p>The square root of a distribution's variance.</p> Signup and view all the answers

<p>A measure of variation that describes the relative distance between the data points in a set around the mean of the data set.</p> Signup and view all the answers

<p>Allows you to assign more weight to certain values and less weight to others when calculating the mean.</p> Signup and view all the answers

<p>A measure that identifies the number of standard deviations a particular value is from the mean of its distribution.</p> Signup and view all the answers