Standard Deviation and Skew

Question 1

Standard deviation

Answer 1

A measure of how much all the values deviate from the mean value; or how spread out they are

Question 2

Skew

Answer 2

A distribution can be symmetrical or have a negative or positive skew

Question 3

Positive skew

Answer 3

Median closer to the lower quartile

The values of the above the median are more spread out

Question 4

Symmetrical distribution

Answer 4

Median exactly halfway between upper and lower quartile and the median mode and mean are approximately the same

Question 5

Negative skew

Answer 5

Median closer to the upper quartile

The values below the median are more spread out

Question 6

Indications for positive and negative skew

Answer 6

mean>median>mode could indicate a positive skew

mode>median>mean could indicate a negative skew