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Given a mean of 25 and a standard deviation of 2.3, what is the z-score of a data value of 29?

I don't understand the formula they gave me for the z-score, so I dunno where to start. /:

2 answers

Was this the equation they gave you?

Z = (score-mean)/SD

Just insert values and solve for Z.

A car cost $20,100 with a standard deviation of $3500. The z score for the car is 2.3. What was the price of the car?

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