X values for z scores

Question

Now find the X value that corresponds to each of the following z scores: 1.00, 0.25, 1.50, -.50, -1.25,-2.50

Answer 1

Hi Dee-Dee,

The z-value, or standard score, is the number of standard deviations from the mean the measurement is.

To find the x value we'll need more information than what's listed here.

The formula you need to use is : z = (x - µ) / σ, where z is your z score, x is the x value, µ is the population mean, and σ is the standard deviation. Another way to look at this formula is x = z * σ + µ.

Let me know if you need any help with this or would like a further explanation about why this formula works

Best

Jake