Answer to Question #219179 in Statistics and Probability for shoki

Statistics and Probability

Question #219179

1. The probability that it will be a sunny day is 0.4. Find the expected number of fine days in a week and also the standard deviation.

Expert's answer

"\\mu=np=7*0.4=2.8."

"\\sigma=\\sqrt{np(1-p)}=\\sqrt{7*0.4*0.6}=\\sqrt{1.68}\\approx1.2961."

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