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MEAN=10 & STD DEVIATION=2. FIND THE PROBABILITIES: 9.4 less than X less than 10.6?

i have 2 different answers but am checking the answer. thank you

1 answer

I assume your mean scores of 9.4 and 10.6.

Z = (score-mean)/SD

Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportions related to the Z scores.