A random variable X can take only two values, 4 and 5 such that P(X = 4) = 0.53 and P(X = 5) = 0.47. The Variance of X is: O 0.2491 O 0.2464 0.2139 O None of these

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Chapter1: Combinatorial Analysis
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A random variable X can take only two values, 4 and 5 such that P(X = 4) = 0.53 and
P(X = 5) = 0.47. The Variance of X is:
0.2491
0.2464
0.2139
None of these
Transcribed Image Text:A random variable X can take only two values, 4 and 5 such that P(X = 4) = 0.53 and P(X = 5) = 0.47. The Variance of X is: 0.2491 0.2464 0.2139 None of these
Suppose you decided to switch from 95% to 99% confidence interval estimate for the
mean. The interval will
Decrease
Cannot tell
Increase
Stay the same
Transcribed Image Text:Suppose you decided to switch from 95% to 99% confidence interval estimate for the mean. The interval will Decrease Cannot tell Increase Stay the same
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