Math III - Normal Distribution 5/15

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%

The center of the curve represents what value of a data set?

• μ
• δ
• Σ
• Ζ

What is the standard deviation on the graph given?

What is the mean on the graph given?

A grading scale is set up for 1000 students’ test scores. It is assumed that the scores are normally distributed with a mean score of 75 and a standard deviation of 15. Calculate the score that lies -2 standard deviation from the mean.

• 60

• 475

• 45

• 9500

The shelf life of a particular dairy product is normally distributed with a mean of 12 days and a standard deviation of 3 days. About what percent of the products last between 12 and 15 days?

• 68%

• 99.7%

• 95%

• 34%

The distribution above is normal. What percent lies below the curve?

• 68%

• 95%

• 99.7%

• 100%

What is the standard deviation on this Normal Curve?

• 6

• 12

• 34

• 18

Between what two standard deviations of a normal distribution contain 95% of the data?

• one below and one above

• two below and two above

• two below and zero

• zero and two above