normal Distribution

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%

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

• 25%
• 68%
• 95%
• 99.7%

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

• μ
• δ
• Σ
• Ζ

How is the graph distributed?

• Normally

• Skewed to the Left

• Skewed to the Right

• Uniform

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

• 68%

• 95%

• 99.7%

• 100%

The mean GPA of students in a course at UGA is 3.2 with a standard deviation of 0.3. What percent of students in the course have a GPA between 2.9 and 3.8?

• 81.5%

• 47.5%

• 68%

• 95%

This data is normally distributed. What percent of the data is in the shaded regions?

• 5%

• 95%

• 2.5%

• 50%

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%
• 34%
• 16%
• 2.5%

Given a mean of 75 and a standard deviation of 7, what percentage of scores are above 82?

• 34%

• 16%

• 81.5%

• 2.5%