Asked by Jacob
                SAT scores are normally distributed with a mean of 1518 and a standard deviation of 325. What scores correspond to P20 and P65?
            
            
        Answers
                    Answered by
            PsyDAG
            
    What do you mean by "P20 and P65"?
If I assume that those are percentiles, find table in the back of your statistics text labeled something like "areas under normal distribution" to find the Z scores corresponding to the proportions indicated. Insert the values into the following equation.
Z = (score-mean)/SD
    
If I assume that those are percentiles, find table in the back of your statistics text labeled something like "areas under normal distribution" to find the Z scores corresponding to the proportions indicated. Insert the values into the following equation.
Z = (score-mean)/SD
                    Answered by
            Anonymous
            
    32.5
    
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