Statistics Concepts Normal Distribution

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

• one below and one above

• two below an zero

• two below and two above

• zero and two above

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

• 100

• 5

• 25

• 1

What is NOT true about the standard normal distribution?

• it is bell-shaped.

• it is asymmetrical.

• it is unimodal

• the mean is 0 and the standard deviation is one.

The z-score represents....

• the amount of standard deviations a data value is above or below the mean.

• the amount of standard deviations a data value is above or below the media .

• the percentile the data value is above or below the mean.

• the percent the data value is above or below the mean.

Find the area that corresponds to z = 2.31

• 0.4772

• 0.4778

• 0.4896

• 0.4893

Compute the area that correspond to the given:

From z = 0.1 to z = 1.6

• 1.4849

• 1.4850

• 1.4851

• 1.4852

Which image correspond to z = 2.75 to z = -1.75?

• 
• 
• 
• 

Between what two standard deviation of normal distribution contain 95% of the data?

• one below and one above

• two below an zero

• two below and two above

• zero and two above

Find the area under normal curve if z = -0.75 to z = -2.75.

• 0.4970

• 0.7703

• 0.7704

• 0.2734

Find the area under normal curve if the value of z= 0 to z = 1.84.

• 0.4670

• 0.4671

• 0.4672

• 0.4673