SOLUTION: In a population of exam scores, a score of X=28 correspond to z= -1.00, and a score of X=34 corresponds to z= -0.50. Find the mean and standard deviation for the population
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-> SOLUTION: In a population of exam scores, a score of X=28 correspond to z= -1.00, and a score of X=34 corresponds to z= -0.50. Find the mean and standard deviation for the population
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Question 1124615: In a population of exam scores, a score of X=28 correspond to z= -1.00, and a score of X=34 corresponds to z= -0.50. Find the mean and standard deviation for the population Answer by Boreal(15235) (Show Source):
You can put this solution on YOUR website! z=(x-mean)/sd
-1=(28-mean)/sd
-sd=28-mean
mean-sd=28
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-0.5=(34-mean)/sd
-0.5sd=34-mean
mean-0.5 sd=34
mean-sd=28
-mean+0.5sd=-34
-0.5sd=-6
sd=12 ANSWER
therefore, mean=40 ANSWER
