Term
| what is an average used for |
|
Definition
| to find the center (of a histogram). Also referred to as the median. |
|
|
Term
| what does the standard deviation do |
|
Definition
| it measures the spread around the average |
|
|
Term
| What is the interquartile range (IQR) |
|
Definition
| another measure of spread |
|
|
Term
| The average of a list of numbers equals what |
|
Definition
| the sum of the numbers, divided by how many numbers there are |
|
|
Term
| the position of the average and the median can be visualized with |
|
Definition
| an idea of balancing the histogram |
|
|
Term
| what is the median of a histogram |
|
Definition
| the value with half of the area to the left and half of the area to the right |
|
|
Term
| what does the standard deviation measure |
|
Definition
| the size of the deviations from the average. it's a sort of average deviation |
|
|
Term
| what does the standard deviation tell us |
|
Definition
| how far away numbers on a list are from their average. Most entries on the list will be somwhere around one SD away from the average. Few will be more thantow or three SD's away. |
|
|
Term
| how do you find the SD of a list |
|
Definition
| deviation from average = entry - average |
|
|
Term
| stem plot is also know as |
|
Definition
|
|
Term
| what does the five number summary consist of |
|
Definition
LE= lower quartile or smallest # in the set
Q1= the lowr or first quartile
Q2= the median, or second quartile
Q3= the upper or third quartile
UP- upper extree or the larges # in the set |
|
|
Term
| what is the formula for the median position when using the stemplot method |
|
Definition
|
|
Term
|
Definition
| a graphical summarization of teh five plot summary |
|
|
Term
| how do you find the range of the boxplot |
|
Definition
| upper extreme minus the lower extreme |
|
|
Term
| when do you have an outlier on the boxplot |
|
Definition
a data point is an outlier if it is less than Q1-(1.5 X IQR) or
greater than Q2+(1.5 X IQR) |
|
|
Term
|
Definition
|
|
