Standard Deviation Calculation

Autore:Matthew Kushner

Standard deviation is another way to measure how spread out data values are. The simulator below has 12 points. Use it to answer the questions below and see how standard deviation is calculated.

Play with the points and move the position. The standard deviation is calculated below. Look at the "Variance" fraction. The first number on top related to the point A and the second to B. How?

Seleziona una o più risposte corrette

A
The number that is squared is the mean.
B
The number that is squared is the x value of the point.
C
The number that is squared is the difference of the x value of the point and the mean.
D
The number that is squared is the y value of the point.

Controlla la mia risposta (3)

Which best describes how the variance is calculated?

Seleziona una o più risposte corrette

A
Add up the square of the mean for each point and divide by the number of points.
B
Add of the squares of the distance of each point to the mean and divide by the number of points.
C
Add up the square of the x value of each point and divide by the number of points.
D
Add up the distance of each point to the mean and divide by the number of points.

Controlla la mia risposta (3)

Move the points. What is the smallest possible standard deviation?

Seleziona una o più risposte corrette

A
-1
B
1
C
0
D
0.5

Controlla la mia risposta (3)

Move all the points but keep them between 0 and 10 (including 0 and 10) What is the largest possible standard deviation?

Seleziona una o più risposte corrette

Controlla la mia risposta (3)

Standard Deviation Calculation

Nuove risorse

Scopri le risorse

Scopri gli argomenti