Statistics & Equations

Question 1

What is Sample variance ?

Answer 1

Used. To measure the spread of the data points in a given data set around the mean.

Question 2

In a normally distrubuted dataset, what percentage of the population falls within one standard deviation?

Answer 2

68%

Question 3

In a normally distrubuted dataset, what percentage of the population falls within two standard deviation?

Answer 3

95.45% (95%)

Question 4

In a normally distrubuted dataset, what percentage of the population falls within three standard deviation?

Answer 4

99.7%

Question 5

Which measure of central tendency is least affected by extreme outliers?

Answer 5

Median

(Focused on position, not magnitude)