The Practice of Statistics

Find the area under the curve between z = 1.23 and z = 1.90

• .0806

• .0987

• .0735

• .0563

Find the area under the standard normal curve to the right of z = -2.67.

• 0.0869
• 0.9962
• 0.0008
• 0.1234

Find the area under the normal distribution curve to the left of 
Z=0.27.

• 0.3936
• 0.3897
• 0.6064
• 0.4892

Find the area under the normal distribution curve between 
z=-1.53 and z=0.

• 0.437
• 0.563
• 0.500
• 0.063

Find the area under the standard normal curve to the right of z = -2.67.

• 0.0869
• 0.9962
• 0.0008
• 0.1234

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

• 68%
• 95%
• 99.7%
• 50%

A z-score tells you...

• the standard deviation of a sampling distribution.
• the original raw score on which it is based.
• if the distribution it comes from is normal.
• how many standard deviations away from the mean a score lies.

P(0 < z < 1.69)

• .5454

• .4545

• .9867

• .2749

P(0 < z < 0.067)

• .5739

• .5783

• .2486

• .1794

P(-1.23 < z < 0)

• .3875

• .7593

• .3275

• .3907