equals the probability of at most hits during an interval for which A is the expected value of the number of hits.
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Let ,
The probability mass function of X is
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- The time it takes me to wash the dishes is uniformlydistributed between 6 minutes and 16 minutes.What is the probability that washing dishes tonight will take me between 12 and 14 minutes? Give your answer accurate to two decimal places.Aircraft arrive at a certain airport at a rate of 2 per hour. What is the probability that in a time period of three hours arrive at least an aircraft?When practicing basketball, Rachel has a 67% chance of making a free throw. She shoots 12 free throws. Let the random variable X be the number of free throws she makes. Find the probability she makes exactly 5 free throws. Give your answer to at least three nonzero decimal places. What is the expected value of X. Interpret this value.
- The time it takes to complete an online survey is uniformly distributed over the range of 10.1 minutes to 16 minutes. Calculate the probability that it takes a person between 11.2 and 11.9 minutes to complete the survey.The table summarizes results from pedestrian deaths that were caused by automobile accidents. Pedestrian Deaths Driver Pedestrian Intoxicated? Intoxicated? Yes No Yes 60 85 No 289 548 If one of the pedestrian deaths is randomly selected, find the probability that the pedestrian was intoxicated. (Round your answer to 4 decimal places.) Probability = Submit QuestionIn a video game, a specific attack succeeds at a rate of 20% and every try is independent. Determine the probability that the first attack lands on the 3rd try.
- The mean percent of childhood asthma prevalence in 43 cities is 2.21%. A random sample of 32 of these cities is selected. What is the probability that the mean childhood asthma prevalence for the sample is greater than 2.6%? Interpret this probability. Assume that o= = 1.21%. The probability is (Round to four decimal places as needed.)The probability that someone passes the road test to get a driver's license is 0.55. Let N represent the number of road tests a person must take to get his/her driver's license. Find P(N < 6). (Round your answer to 3 decimal places).