Normal and Skewed Distribution Curves

Question 1

What is another word for a normal distribution curve?

Answer 1

Classic bell-shaped curve

Question 2

What are the two features of a normal distribution curve?

Answer 2

Mean, median and mode in the exact mid-point
Distribution is symmetrical around mid-point

Question 3

Why do we get positively skewed data?

Answer 3

If most values tend to be toward the lower end, than the higher end e.g. hard class test majority of class with low scars, a few high scores

Question 4

What does a positive skew do to the mean?

Answer 4

Brings it up

Question 5

Why do we get negatively skewed data?

Answer 5

If most values are towards the higher end, than the lower e.g. easy class test majority of class with high scores, a few with low scores

Question 6

What does a negative skew do to the mean?

Answer 6

Brings it down

Question 7

How can the positive and negative skews be remembered?

Answer 7

Left Foot (little to big) NEGATIVE
Right Foot (big to little) POSITIVE