distribution curves Flashcards
1
Q
why would a distribution curve have a positive skew?
A
if the mode is a lower number than the mean
2
Q
why would a distribution curve have a negative skew?
A
when the mode is a higher number than the mean
3
Q
what is a normal distribution curve (bell curve)
A
when the mean, median and mode are in line with one another
4
Q
what percentage of the data falls within 1 standard deviation of the mean in a normal curve?
A
68%
5
Q
what percentage of data falls within 2 standard deviations of the mean in a normal curve?
A
95%
6
Q
what percentage of data falls within 3 standard deviations of the mean on a normal curve?
A
99.7%
