Normal Curve Practice 1

• 68%

• 95%

• 99.7%

• Not Enough Information

• 68%

• 95%

• 99.7%

• Not Enough Information

The mean life of a tire is 30,000km with a standard deviation of 2000km. 68% of tires will last between ________ km and ________ km.

• 24,000 and 36,000

• 26,000 and 34,000

• 28,000 and 32,000

• Not enough information

The mean life of a tire is 30,000km with a standard deviation of 2000km. 95% of tires will last between ________ km and ________ km.

• 24,000 and 36,000

• 26,000 and 34,000

• 28,000 and 32,000

• Not enough information

The mean life of a tire is 30,000km with a standard deviation of 2000km. 99.7% of tires will last between ________ km and ________ km.

• 24,000 and 36,000

• 26,000 and 34,000

• 28,000 and 32,000

• Not enough information

The mean life of a tire is 30,000km with a standard deviation of 2000km. What percent of tires have a life that exceeds 26,000km?

• 97.65%

• 68%

• 95%

• 2.35%

The mean life of a tire is 30,000km with a standard deviation of 2000km. What percent of tires have a life that does not exceeds 26,000km?

• 97.65%

• 68%

• 95%

• 2.35%

The shelf life of a 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 9 and 15 days.

• 68%

• 95%

• 99.7%

• Not enough information

The shelf life of a 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%

• 95%

• 99.7%

• 81.5%