Question: 1. True or False. Justify for full credit. (a) The standard deviation of a data set cannot be negative. (b) If P(A) = 0.4 ,

1. True or False. Justify for full credit. (a) The standard deviation of a data set cannot be negative. (b) If P(A) = 0.4 , P(B) = 0.5, and A and B are disjoint, then P(A AND B) = 0.2. (c) The mean is always equal to the median for a normal distribution. (d) A 95% confidence interval is wider than a 98% confidence interval of the same parameter. (e) In a two-tailed test, the value of the test statistic is 1.5. If we know the test statistic follows a Student's t-distribution with P(T

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