Standard Distribution

What is the standard deviation of this distribution? (how far is it from the mean to the first stdev line?)

• 1010

• 20

• 60

• 40

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

• 68%

• 95%

• 99.7%

• 50%

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

• 68%

• 95%

• 99.7%

• 50%

The normal distribution curves represents U.S. female heights. What percentage of females are between 5'6.5" and 5'11"?

• 16%

• 68%

• 81.5%

• 95%

The mean GPA of students in a course at UCDavis is 3.2 with a standard deviation of 0.3. What percent of students in the course have a GPA between 2.9 and 3.5?

• 81.5%

• 47.5%

• 68%

• 95%

The mean life of a tire is 30,000 km. The standard deviation is 2000 km.

Then, 68% of all tires will have a life between ___________ km and __________ km.

•  28,000 km and 32,000 km.

• 24,000 km and 34,000 km.

• 26,000 km and 34,000 km.

• 27,000 km and 31,000 km.

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 6 and 18 days?

• 68%

• 95%

• 99%

• 2.5%

What shape is another name for a normal distribution?

• Half curve

• Round curve

• Bell curve

• Square curve

According to the normal distribution, what percentage of data falls within 1 standard deviation?

• 25%

• 68%

• 95%

• 99.7%

The data is _____ standard deviation(s) from the mean.

• 1

• 2

• 3