Question: 7. For a normal distribution. find the probability that an observation is a) At least one standard deviation above the mean. b) At least one

7. For a normal distribution. find the probability that an observation is

a) At least one standard deviation above the mean.

b) At least one standard deviation below the mean.

c) At least .67 standard deviations above the mean

d) At least 2.33 standard deviations above the mean.

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