Empirical rule

Question 1

How much of a normal curve is one standard deviation away from the mean?

Answer 1

68%

Question 2

How much of a normal curve is 2 standard deviations away from the mean?

Answer 2

95%

Question 3

How much of a normal curve is 3 standard deviations away from the mean?

Answer 3

99.6%

Question 4

Z = ?

Answer 4

x - mu / sigma

Question 5

When do you subtract the %?

Answer 5

If the question is asking “greater than”