Distribution Curves

Question 1

why would a distribution curve have a positive skew?

Answer 1

if the mode is a lower number than the mean

Question 2

why would a distribution curve have a negative skew?

Answer 2

when the mode is a higher number than the mean

Question 3

what is a normal distribution curve (bell curve)

Answer 3

when the mean, median and mode are in line with one another

Question 4

what percentage of the data falls within 1 standard deviation of the mean in a normal curve?

Answer 4

68%

Question 5

what percentage of data falls within 2 standard deviations of the mean in a normal curve?

Answer 5

95%

Question 6

what percentage of data falls within 3 standard deviations of the mean on a normal curve?

Answer 6

99.7%