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110年 - 110 國立臺灣大學_碩士班招生考試_土木工程研究所交通組:統計學(C)#100575
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6. [10%] The cumulative distribution function for random variable X is given by:
(ii) (5%) Find the expected value of X.
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3.[10%] Laboratory tests are performed to evaluate the compressive strengths for 2 types of concrete (A and (B). 10 specimens are used for each type of concrete. The sample standard deviati tions are 200 kPa and 250 kPa for concrete A and concrete B, respectively. Construct a 90% confidence interval for the ratio of the 2 population variances
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(i) (5%) Determnine the median of X.
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