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Which of the following statements is true?(a) Technically, 99% of the area under a normal distribution lies between +/ 1.65σ from the mean.(b) Technically, 90% of the area under a normal distribution lies between +/ 2.33σ from the mean.(c) Technically, 99% of the area under a normal distribution lies between +/ 2.33σ from the mean.(d) Technically, 90% of the area under a normal distribution lies between +/ 1.65σ from the mean.
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