Question 1176407
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Hi
Normal Distribution:     μ = 269   σ  = 11  
Using TI or similarly an inexpensive calculator like a Casio fx-115 ES plus.

P ( 284 < X < 293) = normalcdf (284,293, 11, 269) = .0718

Important to feel comfortable with Your calculator
and know what is permissible4 in in-class testing.
Wish You the Best in your Studies.
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