Statistics Vocabulary

Question 1

numbers that characterize a data set

Answer 1

statistics

Question 2

the sum of the values in the set divided by the number total ( average)

Answer 2

mean

Question 3

is the middle value in a set when the values are arranged in numerical order

Answer 3

median ( Q2)

Question 4

is the difference between the greatest and the least data values ( max-min)

Answer 4

range

Question 5

values that divide a data set into four equal parts ( 25)

Answer 5

quartiles

Question 6

the median of the lower half

Answer 6

1st quartile ( Q1)

Question 7

the median of the upper half of the set

Answer 7

3rd quartile (Q3)

Question 8

the difference between the 3rd and 1st quartile

Answer 8

Interquartile range ( IQR)

Question 9

the average of the distance between the individual data values and the mean

Answer 9

Standard Deviation ( o )

Question 10

a data representation that uses a number line and x’s , dots, or other symbols to show frequency

Answer 10

dot plot ( line plot)

Question 11

is a value in a data set that is much greater or much less than most of the other values in the data set

Answer 11

outlier

Question 12

a bar graph that is used to display the frequency of data divided into equal intervals

Answer 12

histogram

Question 13

a collection of paired variable values

Answer 13

two-variable data

Question 14

a graph of points with one variable plotted along each axis

Answer 14

scatter plot

Question 15

is a measure of the strength and direction of the relationship between 2 variables

Answer 15

correlation

Question 16

a way to quantify the correlation of a data set ( -1 to 1)

Answer 16

correlation coefficient (r)

Question 17

used to show how values in a set are distributed

Answer 17

box plot

Question 18

bell shaped

Answer 18

normal distribution

Question 19

a line through a set of two-variable data that illustrates the correlation

Answer 19

line of fit

Question 20

methods of prediction data values for one variable from another based on a line of fit

Answer 20

Interpolation ( inside) & Extrapolation ( outside)

Question 21

the line that comes closet to all points in the data set

Answer 21

line of best fit

Question 22

a method for finding the equation for the line of best fit

Answer 22

linear regression

Question 23

make distorted in a way that is regarded as inaccurate

Answer 23

skew

* not a vocab word