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- A washing machine in a laundromat breaks down an average of three times per month. Using the Poisson probability distribution formula, find the probability that during the next month this machine will have (a) exactly two breakdowns (b) at most one breakdownLet X = {Email, In Person, Instant Message, Text Message}; P(Email) = 0.06 P(In Person) = 0.55 P(Instant Message) = 0.24 P(Text Message) = 0.15 Is this model a probability distribution? A. Yes. B. No. C. Maybe.Let the probability of winning a bet in a roulette game is 1/38.Find the probability of winning at least 1 time in 38 games with the Binomial formula and the Poisson's approximation to the Binomial distribution.
- Suppose that births in a hospital occur randomly at an average rate of 1.9 births per hour. Assume that the probability of a birth is the same for any two time intervals of equal length. a. Which distribution can we use in this case? b. What is the probability that we observe at least 3 births in a 2-hour interval?c. Suppose that births occur randomly in hospital A and hospital B at an average rate of 2.1 births and 3 births per hour, respectively. What is the probability that we observe 7 births in total from the two hospitals in a 1-hour period?A die has been “loaded” so that the probability of rollingany even number is 2/9 and the probability of rollingany odd number 1/9 is What is the probability of(a) rolling a 5?(b) rolling a 5, given that an even number is rolled?(c) rolling a 5, given that an odd number is rolled?(b) What is the probability that a randomly selected car will spend more than 191 seconds in the restaurant's drive-through? The probability that a randomly selected car will spend more than 191 seconds in the restaurant's drive-through is______ (Round to four decimal places as needed.)
- 8 In a supermarket, the prices marked on the signs that are placed on the shelf do not always correspond to the current price of the merchandise, since errors may occur when recording price changes. Assume that over time 60% of the price changes are increases and 40% are decreases. Assume also that 93% of the price increases are marked correctly, as are 98% of the reductions. If a price is not marked correctly, what is the probability that the change is a reduction?.Assume that Tom attends class randomly with probability 0.55 and that each decision is independent of previous attendance, so that the process can be viewed as a Bernoulli process. What is the probability that he attends at least 7 of 10 classes given that he attends at least 2 but not all 10 classes?Assume that when adults with smartphones are randomly selected, 45% use them in meetings or classes. If 20 adult smartphone users are randomly selected, find the probability that exactly 16 of them use their smartphones in meetings or classes. The probability is ____. (Round to four decimal places as needed.)
- Assume that 12 jurors are randomly selected from a population in which 86% of the people are Mexican-Americans. Refer to the probability distribution table below and find the indicated probabilities. � �(�) 0 0+ 1 0+ 2 0+ 3 0+ 4 0+ 5 0.0004 6 0.0028 7 0.0148 8 0.0569 9 0.1553 10 0.2863 11 0.3197 12 0.1637 Find the probability of exactly 5 Mexican-Americans among 12 jurors.�(�=5)= Find the probability of 5 or fewer Mexican-Americans among 12 jurors.�(�≤5)= Does the occurrence of 5 Mexican-Americans among 12 jurors suggest that the selection process discriminates against Mexican-Americans?The accompanying table shows the numbers of male and female students in a certain region who received bachelor's degrees in a certain field in a recent year. A student is selected at random. Find the probability of each event listed in parts (a) through (c) below Click the icon to view the table. (a) The student is male or received a degree in the field The probability is 0.545. (Type an integer or a decimal. Round to three decimal places as needed.) (b) The student is female or received a degree outside of the field. The probability is (Type an integer or a decimal. Round to three decimal places as needed.) .... Table Males Females Total Degrees in Field 191,503 156,134 347,637 Print Degrees Outside of Field 624,367 812,503 1,436,870 Done Total 815,870 968,637 1,784,507 - XAssume that the monthly worldwide average number of airplaine crashes of commercial airlines is 2.2. What is the probability that there will be (a) at most 2 such accidents in the next month? (b) less than 6 such accidents in the next 3 months? (c) exactly 5 such accidents in the next 4 months?