Review: Measure of Dispersion , Z-score & Normal Curve

Find the z-score for 75 given a mean of 60 and a standard deviation of 6.

• -2.5

• 2.5

• -1.15

• 1.15

Find the z-score for 48 given a mean of 50 and a standard deviation of 5.

• 2.5

• -2.5

• -0.4

• 0.4

Find the z-score for 258 given a mean of 273 and a standard deviation of 5.

• 3

• -2

• 2

• -3

Find the z-score for 62 given a mean of 30 and a standard deviation of 20.

• 1.6

• -1.6

• 11.6

• -11.6

Find the area under the standard normal curve that lies to the left of z=2.1.

• 1.79%

• -1.79%

• 98.21%

• 0.98%

Find the area under the standard normal curve that lies to the right of z=-0.67.

• 63.42%

• 74.86%

• 25.14%

• 50%

Find the area under the standard normal curve that lies between z=-0.5 and z=1.5.

• 62.46%

• 72.47%

• 5.40%

• 62.47%

What is the value of the mean on this Normal Curve?

• 6

• 34

• 52

• 70

What is the standard deviation on this Normal Curve?

• 6

• 12

• 34

• 18

What percent of scores are below a z-score of  $z=-1.02$ ?  (You can also use the z-table from last class's work!)

• 15.87%

• 15.39%

• 9.68%

• 84.61%