Normal Distribution Flashcards
1
Q
When is normal distribution a suitable model
A
-When the data is continuous
-The distribution is equal and bell shaped
-The mean, median and mode are approximately equal
2
Q
What percentage of the values are within 1 standard deviation of the mean
A
68
3
Q
What percentage of the values are within 2 standard deviation of the mean
A
95
4
Q
What percentage of the values are within 3 standard deviation of the mean
A
99.7
5
Q
What is the calculation for the number of standard deviations from the mean
A
(value - mean) / standard deviation
