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which of the following is NOT true about the standard normal distribution? a. about 95% of its observations fall between -2 and 2. b. about
which of the following is NOT true about the standard normal distribution? a. about 95% of its observations fall between -2 and 2. b. about 68% of its observations fall between -1 and 1. c. the area under the standard normal curve to the left of z+0 is negative. d. the standard normal curve is symmetric about 0. e. the total area under the standard normal curve is 1.
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