Based on an analysis of sample data, an article proposed the pdf f(x) = 0.55e-0.55(x - 1) when x ≥ 1 as a model for the distribution of X = time (sec) spent at the median line. (Round your answers to three decimal places.) (a) What is the probability that waiting time is at most 9 sec? More than 9 sec? at most 9 sec P(X ≤ 9) = 0.988 more than 9 sec P(X> 9) = 0.012 (b) What is the probability that waiting time is between 3 and 8 sec? 0.027 X Need Help? Read It Watch It

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Based on an analysis of sample data, an article proposed the pdf f(x) = 0.55e-0.55(x - 1) when x ≥ 1 as a model for the distribution of X = time (sec) spent at the median
line. (Round your answers to three decimal places.)
(a) What is the probability that waiting time is at most 9 sec? More than 9 sec?
at most 9 sec
P(X ≤ 9) =
0.988
more than 9 sec
P(X> 9) =
0.012
(b) What is the probability that waiting time is between 3 and 8 sec?
0.027
X
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Transcribed Image Text:Based on an analysis of sample data, an article proposed the pdf f(x) = 0.55e-0.55(x - 1) when x ≥ 1 as a model for the distribution of X = time (sec) spent at the median line. (Round your answers to three decimal places.) (a) What is the probability that waiting time is at most 9 sec? More than 9 sec? at most 9 sec P(X ≤ 9) = 0.988 more than 9 sec P(X> 9) = 0.012 (b) What is the probability that waiting time is between 3 and 8 sec? 0.027 X Need Help? Read It Watch It
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