sec. 6.1-Standard Normal Distribution

Find the area to the left of a
z-score of 1.25. 

• 0.89
• 0.01
• 0.79
• 0.12

Find the area to the left of a
z-score of –2.31. 

• 0.89
• 0.01
• 0.79
• 0.12 

Find the area under the standard normal curve to the right of
z =1.36.

• 0.0869
• 0.9962
• 0.0008
• 0.1234

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 standard normal curve to the right of
z = 3.15. 

• 0.0869
• 0.9962
• 0.0008
• 0.1234

Find the area under the standard normal curve between z = 0.78 and z = 2.68. 

• 0.8545
• 0.7560
• 0.3110
• 0.2140

Find
P(-1.26<z<3.25). 

• 0.0047
• 0.9204
• 0.8956
• 0.4981

Find
P(0 < z < 2.89). 

• 0.0047
• 0.9204
• 0.8956
• 0.4981

What is the z-score for the 70th percentile of the standard normal distribution?

• 0.75
• 0.53
• -0.68
• I'm lost.

Which z value corresponds to 10% of the data between the mean and the z value?

• -1.28
• 0.53983
• 0.25
• I'm still lost.