Normal Curve

What's the probability of the gray area?

(Mean = 55, Standard dev = 2.5)

• 0.8185

• 0.8413

• 0.8641

• 0.8389

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CCSS.HSS.ID.A.4

What's the probability of the highlighted area?

(Mean = 30, Standard Deviiation= 1)

• 0.8664

• 0.7863

• 0.9332

• 0.8754

Tags

CCSS.HSS.ID.A.4

What's the probability of the highlighted area?

(Mean = 100, Standard dev = 10)

• 0.9772

• 0.0228

• 0.1587

• 0.0062

Tags

CCSS.HSS.ID.A.4

What shape is a normal distribution curve?

• Half curve
• Round curve
• Bell curve
• Square curve

According to the empirical rule, what percentage of data falls within 1 standard deviation? 

• 25%
• 68%
• 95%
• 99.7%

Tags

CCSS.HSS.ID.A.4

According to the empirical rule, how much of the data falls within 3 standard deviations? 

• 25%
• 68%
• 95%
• 99.7%

Tags

CCSS.HSS.ID.A.4

What is the percentage of data that falls within three standard deviations of the mean?

• 99.7%

• 98.7%

• 95%

• 100%

Tags

CCSS.HSS.ID.A.4

What is the percentage of data that falls within two standard deviations of the mean?

• 68%

• 99.7%

• 95%

• 98%

Tags

CCSS.HSS.ID.A.4

What is the percentage of data that falls within one standard deviation of the mean?

• 67%

• 65%

• 72%

• 68%

Tags

CCSS.HSS.ID.A.4

1.  Which best describes the shaded part of this normal distribution graph?  

• All data that is one or higher.
• All data that is one or more standard deviations above the mean.
• All data that is between 1 and 3.
• All data that is above the mean.