Understanding Data Spread and IQR

Calculating the mean of data

Measuring the center of data

Measuring the spread of data

Understanding data collection methods

They have different means

They have the same range

They have the same mean, mode, and median

They have different modes

To understand how data is distributed

To identify the mode

To calculate the total sum

To find the average value

Range

Mean

Interquartile Range

Standard Deviation

Sum of all values divided by number of values

Middle value of the data set

Largest value minus smallest value

Smallest value minus largest value

Interquality Range

Internal Quality Ratio

Internal Quartile Ratio

Interquartile Range

By subtracting the smallest number from the largest

By locating the middle number in an ordered set

By identifying the most frequent number

By finding the average of all numbers

8

3

11

5

To determine the mode

To make the process faster and more accurate

To avoid manual calculations

To find the mean

Use the existing numbers

Start over with a new data set

Add the missing number and recalculate

Ignore it