13 X is a normally distributed random variable with a mean of 4 0 . Find the standard deviation of the distribution if 59 1096 of the data lies to…

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13 X is a normally distributed random variable with a mean of 4 0 . Find the standard deviation ofthe distribution if 59 1096 of the data lies to the right of 3 20 . ( Note : the diagram is notnecessarily to scale .Ans: 35

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