Stats

It is computed by getting the weighted average of all possible values of a random variable.

• mean

• variance

• standard deviation

• binomial distribution

According to the Center for Disease Control, 93% of children entering kindergarten in the U.S. are vaccinated.

Find the z-score associated with a sample of 180 children in which 162 have been vaccinated.

• -1.34

• 1.34

• .0901

• .9099

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

• 68%

• 95%

• 99.7%

• 50%

The center of the curve represents what value of a data set?

• μ

• δ

• Σ

• Ζ

What is the percentage of data that falls within two standard deviations of the mean? 

• 68%

• 95%

• 99.7%

What is the area under the curve to the left of z = 0.55 ?

• .2912

• .5500

• .9394

• .7088

What is the area under the curve to the right of z = .25, the white part of the curve?

• .5987

• .4013

• .9938

• .0062

What is the area under the curve between z = 0 and z = 1.45?

• .9265

• .4265

• .4500

• .5000

What is the area under the curve between z = 1 and z = 0 ?

• .68

• .34

• 1

• .8413

What is the area under the curve greater than z = 3.01

• .9987

• .0013

• .9990

• .001