Probability and Statistics

Find the area of the shaded region.

• .16

• .68

• .84

• .34

Find the area under the shaded region

• .16

• .84

• .68

• .34

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.

• 26,000 km and 34,000 km.

• 24,000 km and 34,000 km.

• 28,000 km and 32,000 km.

• 27,000 km and 31,000 km.

Between what two standard deviations of a normal distribution contain 68% of the data?

• two below and zero

• one below and one above

• two below and two above

• zero and two above

What is the total area under the normal curve in a standard normal distribution?

• 2

• 4

• 3

• 1

Where can we locate the mean in the normal curve?

• to the left portion

• to the right portion

• at the center

• on the z - axis

Find the area of the shaded region.

• .935

• .024

• .063

• -.073

Find the area of the shaded region

• 0.0075

• 0.9649

• 0.9573

• 0.7211

Find the area of the shaded region

• 0.8686

• 0.0645

• 0.9332

• 0.1314

Find the area under the normal distribution curve between a z=-1.26 and z=.57.

• 0.0047

• 0.6118

• 0.9204

• 0.4981