find the zscore

What is the correct formula for finding z-scores?

• z = -1.00

• z = 1.00in

• z = 2.00

• z = -1.00in

Which of the following are true statements regarding z-scores?

• They include units

• They do not include units

• A negative z-score suggests the observation is less than the mean

• They are calculated using Medians and IQR's

• They are calculated using Means and Standard Deviations

Composite scores on the ACT are normally distributed with a mean of 21 and standard deviation of 5.

Find the z-score for a student that scores a 28.

Home prices in a certain neighborhood are normally distributed with a mean of $200,000 and a standard deviation of $10,000. Which of the following is the z-score for a home that costs $193,000?

• -$0.70

• $0.70

• -0.70

• 0.70

The z score provides

• Information about how many standard deviations the score is from the mean

• The highest score

• The lowest score

• The mode

A positive standardized score represents

• An observed value at the mean

• An observed value above the mean

• One standard deviation

• Two standard deviations