METHODS OF DATA ANALYSIS
MEASURES OF DISPERSION
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
When calculating variance, what do you do?
|
|
cubing the answer
|
|
|
divide the answer
|
|
|
multiply the answer
|
|
|
square the answer
|
Explanation:
Detailed explanation-1: -You can calculate the variance by taking the difference between each point and the mean. Then square and average the results.
Detailed explanation-2: -In statistics, variance measures variability from the average or mean. It is calculated by taking the differences between each number in the data set and the mean, then squaring the differences to make them positive, and finally dividing the sum of the squares by the number of values in the data set.
Detailed explanation-3: -For a population, the variance is calculated as ² = ( (x-)² ) / N. Another equivalent formula is ² = ( ( x²) / N )-². If we need to calculate variance by hand, this alternate formula is easier to work with.
There is 1 question to complete.