Mathematics, 13.03.2020 01:57 jaylon78
College professor never finishes his lecture before the end of the hour and always finishes his lectures within 2 min after the hour. Let X = the time that elapses between the end of the hour and the end of the lecture and suppose the pdf of X is as follows. f(x) = kx^2 0 ? x ? 20 otherwisea) Find the value of k. (Enter your answer to three decimal places.).375b)What is the probability that the lecture ends within 1 min of the end of the hour? (Enter your answer to three decimal places.) .125c) What is the probability that the lecture continues beyond the hour for between 15 and 45 sec? (Round your answer to four decimal places.)(d) What is the probability that the lecture continues for at least 75 sec beyond the end of the hour? (Round your answer to four decimal places.)
Answers: 2
Mathematics, 22.06.2019 03:00
He letter p on the number line below represents the number . (use the hyphen for negative numbers and write answer as a decimal, such as β7.2) number line from negative 7 to positive 7 in increments of 0.5 is shown. only the whole numbers are labeled. a point labeled p is placed at the eleventh tick mark to the left of 0.
Answers: 3
Mathematics, 22.06.2019 03:10
(co 3) the times that customers spend in a book store are normally distributed with a mean of 39.5 minutes and a standard deviation of 9.4 minutes. a random sample of 25 customers has a mean of 36.1 minutes or less. would this outcome be considered unusual, so that the store should reconsider its displays? no, the probability of this outcome at 0.035, would be considered usual, so there is no problem yes, the probability of this outcome at 0.035, would be considered unusual, so the display should be redone no the probability of this outcome at 0.359 would be considered usual, so there is no problem yes, the probability of this outcome at 0.965 would be considered unusual, so the display should be redone
Answers: 1
College professor never finishes his lecture before the end of the hour and always finishes his lect...
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