Studied by 12 peopleBetween -1 deviation and the mean
Where does 34% of the area of this normal curve lie?
Between +1 and +2 deviations
Where Does 13.5% of the area of this normal curve lie?
Between -2 and -3 devations
Where Does 2.35% of the area of this normal curve lie?
Above +3 deviations
Where does 0.15% of the area of this normal curve lie?
Within 1 Standard Deviation of the Mean; The Red Zone
Where can you find 68% of the area of this normal curve?
Within 2 Standard Deviations of the Mean; The Red and Green Zones Combined
Where can you find 95% of the area of this normal curve?
Within 3 Standard Deviations of the Mean; The Red, Green, and Blue Zones Combined
Where Can You Find 99.7% of the area of this normal curve?
34
You are +1 standard deviation away from the mean. This is ___% of the area of the normal curve.
47.5
You are +2 standard deviations away from the mean. This is ___% of the area of the normal curve.
49.85
You are +3 standard deviations away from the mean. This is ___% of the area of the normal curve.
0.15
You are beyond +3 standard deviations away from the mean. This is ___% of the area of the normal curve.
34
You are -1 standard deviation away from the mean. This is ___% of the area of the normal curve.
+2 or -2
You are ___ standard deviation(s) away from the mean. This accounts for 47.5% of the area of a normal curve.
+1 or -1
You are ___ standard deviation(s) away from the mean. This accounts for 34% of the area of a normal curve.
Above +3 or Below -3
You are ___ standard deviations away from the mean. This is 0.15% of the area of the normal curve.
16
You are below -1 deviation. This is ___% of the area of the normal curve.
2.5
You are above +2 standard deviations. This is ___% of the area of the normal curve.
1
68% of the area of a normal curve within ___ standard deviation(s) away from the mean.
2
95% of the area of a normal curve is within ___ standard deviation(s) away from the mean.
95
______% of the area of a normal curve is 2 standard deviations away from the mean.
3
99.7% of the area of a normal curve is ___ standard deviation(s) away from the mean.
68
1 standard deviation of the mean accounts for ___% of the area of a normal curve.
99.7
3 standard deviations of the mean accounts for ___% of the area of a normal curve.
x̄
The mean of a sample
s
The standard deviation of a sample
σ
The standard deviation of a population
μ
The mean of a population
Skewed Distributions
Use the median and IQR for center and spread
Normal Distributions
Use the mean and standard deviation for center and spread.
Mean = 100, S.D. = 10. 68% of the values will be between which two numbers?
90 and 110
Mean = 100 S.D. = 10. 95% of the values will be between which two numbers?
80 and 120
Mean = 100 S.D. = 10. 99.7% of the values will be between which two numbers?
70 and 130
Mean = 100 S. D. = 10. The value 115 is how many deviations from the mean?
+1.5
Mean = 100 S. D. = 10. The value 95 is how many deviations from the mean?
-0.5
Mean = 100 S.D. = 10. 34% of the values will be between which two numbers?
90 and 100
Mean = 100 S. D. = 10. The value 123 is how many deviations from the mean?
+2.3
Mean = 100 S. D. = 10. The value 84 is how many deviations from the mean?
-1.6
Note
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