5.9 Standardized Values

5.9

Standardized Values

Multiple Choice

In a normal distribtuion, standardized values are called...

• T-cells

• P-values

• z-scores

• s-cargo

Multiple Choice

Choose the single best answer. Read each choice carefully.

"The z-score of a value represents...

• ...how many standard deviations a value is from the mean."

• ...how far a value is from the mean."

• ...which side of the mean a value is on."

• ...the amount of skew in the data distribution."

Multiple Select

Which z-scores are above the mean. Check all that apply.

• 0.5

• -1.2

• 0.7

• -2.5

Multiple Select

Which z-scores are below the mean. Check all that apply.

• -1.8

• 0

• -0.6

• -2.17

Multiple Choice

For 2012, the SAT math test had a mean of 514 and standard deviation of 117. Calculate the z-score for a SAT math score of 700.  Use the formula:

 $z=\frac{x-\mu}{\sigma}$ 

• 1.51

• 1.54

• 1.59

• 1.62

Multiple Choice

For 2012, the ACT math test  had a mean of 21 and standard deviation of 5.3. Find the z-score of an ACT math score of 30. Use the formula:

 $z=\frac{x-\mu}{\sigma}$ 

• 1.64

• 1.70

• 1.76

• 2.60