SOLUTION: A large set of sample scores yeilds a mean and a standard deviation of 75.00 and 5.00 respectivly. The distribution is roughly bell shaped. what percentage of the scores should f

Question 58084: A large set of sample scores yeilds a mean and a standard deviation of 75.00 and 5.00 respectivly. The distribution is roughly bell shaped. what percentage of the scores should fall between 70.00 and 80.00?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
A large set of sample scores yeilds a mean and a standard deviation of 75.00 and 5.00 respectivly. The distribution is roughly bell shaped. what percentage of the scores should fall between 70.00 and 80.00?
------------
If you know something about z-scores you convert 70 and 80
to z-scores, then use your z chart to find the area over
the z interval.
Percentage(70 = 0.6826 = 68%
Cheers,
Stan H.
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