Normal Probability

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

• 100

• 25

• .5

• 1

μ = 70 , σ = 8 , X = 50 . Find z score

• 2.5

• -2.5

• 5.2

• -5.2

Which is NOT true about the standard normal distribution?

• It is bell-shaped.

• It is unimodal.

• The mean is 0 and the standard deviation is 1.

• It is asymmetrical.

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 of the shaded region if the z-score is 1.25

• 0.1056

• 0.8944

• 0.8849

• 0.1151

Which of the following graphs shows a normal curve?

• 
• 
• 
• 

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

• -0.73

• 0.7673

• 0.2327

• 0.73

Find the probability the snowfall will be between 3 and 6 inches.

• .2

• .4

• .6

• 1

The mean temperature in Glens Falls for the month of February is 23 degrees with a standard deviation of 4.2 degrees.  How many standard deviations from the mean would a temperature of 17 degrees be?  

• 1 

• 1.429

• -1.429

• 11.5