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1. If X is a normal random variable with mean 11, and if the probability that X is less than 12.10 is .72 (as shown

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If X is a normal random variable with mean 11, and if the probability that X is less than 12.10 is .72 (as shown below), then what is the standard deviation of X? (Note: the diagram is not necessarily to scale.)

http://elearn.usp.ac.fj/pluginfile.php/690901/question/questiontext/1037415/7/649633/Quiz7a.JPG---(IMAGE HERE)

2.If X is a normal random variable with mean 11, and if the probability that X is less than 12.10 is .72 (as shown below), then what is the standard deviation of X? (Note: the diagram is not necessarily to scale.)

http://elearn.usp.ac.fj/pluginfile.php/690901/question/questiontext/1037415/5/668545/Quiz7a.JPG(IMAGE HERE)

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