Exploring the 11 7 Normal Curve

What is the shape of the curve typically associated with normal distribution?

• Linear

• Bell-shaped

• Exponential

• Sigmoid

What is the maximum value on a normal curve known as?

• Mode

• Median

• Mean

• Range

What percentage of data falls within one standard deviation from the mean in a normal distribution?

• 95%

• 50%

• 68%

• 99.7%

How much data falls within two standard deviations from the mean in a normal distribution?

• 68%

• 95%

• 99.7%

• 50%

If the mean ACT score is 21, what is the score that is one standard deviation above the mean?

• 21

• 16.3

• 25.7

• 18.3

What is the score two standard deviations below the mean if the mean ACT score is 21?

• 16.3

• 25.7

• 30.7

• 11.3

What is the probability of scoring above 26 on the ACT?

• 16%

• 34%

• 68%

• 2.5%

What is the probability of scoring below 12 on the ACT?

• 68%

• 2.65%

• 34%

• 16%

If the mean of a test is 50 with a standard deviation of 4, what score is three standard deviations above the mean?

• 54

• 50

• 62

• 58

What percentage of scores fall between two standard deviations from the mean in the test with a mean of 50?

• 50%

• 99.7%

• 95%

• 68%