Statistics > EXAM > STAT 200 FINAL EXAM 1 ; Latest Complete Solutions (All)

STAT 200 FINAL EXAM 1 ; Latest Complete Solutions

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1.True or False. Justify for full credit. (a)If the variance of a data set is zero, then all the observations in this data set are zero. (b)If P(A) = 0.4 , P(B) = 0.5, and A and B are disjoint... , then P(A AND B) = 0.9. (c)Assume X follows a continuous distribution which is symmetric about 0. If , then . (d)A 95% confidence interval is wider than a 90% confidence interval of the same parameter. (e)In a right-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 < 1.5) = 0.96, then we fail to reject the null hypothesis at 0.05 level of significance . [Show More]

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