Suppose the average SAT-Math score is 650 and the standard deviation of SAT-Math is 90. The average SAT-Verbal score is 403 and the standard deviation of SAT-Verbal is 104. The composite SAT score is determined by adding the Math and Verbal portions.

a. What is the mean and standard deviation of the composite SAT score?

μ=\displaystyle \mu= 

σ=\displaystyle \sigma=



b. How much higher, on average, are Math scores vs verbal scores?



c. What is the Standard Deviation of the difference?

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