Study your flashcards anywhere!
Download the official Cram app for free >
 Shuffle
Toggle OnToggle Off
 Alphabetize
Toggle OnToggle Off
 Front First
Toggle OnToggle Off
 Both Sides
Toggle OnToggle Off
 Read
Toggle OnToggle Off
How to study your flashcards.
Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key
Up/Down arrow keys: Flip the card between the front and back.down keyup key
H key: Show hint (3rd side).h key
A key: Read text to speech.a key
23 Cards in this Set
 Front
 Back
frequency distribution

lists data calues (either individually or by groups of intervals), along with their corresponding frequencies (or counts)


lower class limits

smallest numbers that can belong to the different classes


upper class limits

largest numbers that belong to the different classes


class boundaries

numbers used to seperate classes, but without the gaps created by class limits. they are obtained as follows: find the size of the gap between the upper class limit of one class and the lower classe limit of the next class, add half of that amount to each upper class limit to find the upper class boundaries and subtract half that amount from each lower class limit to find the lower class boundaries


class midpoints

midpoints of the classes, each class midpoint can be found by adding the lower class limit to the upper class limit and dividing the sum by two


class width

difference between two consecutive lower class limits or two consecutive lower class boundaries


histogram

bar graph in which horizontal scale represents calsses of data values and the vertical scale represents frequencies, the heights of the bars are drawn adjacent to each other (without gaps)


measure of center

a value at the center of middle of a data set


arithmetic mean

measure of the center found by adding the values and dividing the total by the number of values


median

measure of the center that is the middle value when the original data values are arranged in order of increasing (or decreasing) magnitude


mode

value that occurs most frequently


bimodal

two values occur iwth the same greatest frequency


multimodal

more than two values occur with the same greatest frequency, each is a mode


midrange

measure of the center that is the value midway between the highest and lowest values inthe original data set, found by adding the highest data value to the lowerst data value and then dividing the sum by two


skewed

distribution of data is skewed if it is not symmetric and extends more to one side than the other


range

the difference in a set of data between the maximum and minimum value


standard of deviation

measure of the variation of values about the mean, it is a type of average deviation of values from the mean that is calculated


variance

measure of variation equal to the square of the standard deviation


sample variance

square of the standard deviation s


population variance

square of the popluation standard deviation sigma


standardized score

z scorenumer of standard deviations that a given value x is above or below the mean


5number summary

consists of the minimum value, the first quartile (Q1), the median (or second quartile Q2), the third quartile (Q3), and the maximum value


boxplot

box and whisker digramgraph of a data set that consists of a line extending from the minimum value to the maximum value, and a box with lines drawn at the first quartile, median and third quartile
