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Automobiles arrive at a vehicle equipment inspection station according to a Poisson process with rate ? = 10 per hour. Suppose that with probability 0.4 an arriving vehicle will have no equipment violations.
(a) What is the probability that exactly ten arrive during the hour and all ten have no violations? (Round your answer to four decimal places.)
(c) What is the probability that ten "no-violation" cars arrive during the next hour? [Hint: Sum the probabilities in part (b) from y = 10 to ?.] (Round your answer to three decimal places.)
The mean time to download an Google video is 1 minute 30 seconds. Suppose the download time is normally distributed with standard deviation of 20 seconds.
a mean guy gave you a nice sample from normal distribution with known variance. so the test should be easy. but he
a random sample of 45 door-to-door encyclopedia salespersons were asked how long on average they were able to talk to
The critical F value with 6 numerator and 60 denominator degrees of freedom at α = .05 is:
Mr. James McWhinney, president of Daniel-James Financial Services, believes there is a relationship between the number of client contacts and the dollar amount of sales.
If the t ratio for the slope of a simple linear regression equation is equal to 1.614 and the critical value of the t distribution at the 1% and 5% levels of significance, respectively, are 3.499 and 2.365 is the slope:
a random sample of 16 csn students is taken. the average age in the sample was 27 years with a standard deviation of 4
Three cards are randomly selected from an ordinary deck of cards without replacement Compute the probability that the first card is a spade given that the second and third are spades.
you arrive at a bus stop at 800 a.m. knowing that the bus will arrive at some time uniformly distributed between 845
the editor of a textbook company is trying to decide whether to publish a proposed business statistics textbook.
martindate were tester which can compare two materials in sigle run, weights losses from seven runs. Examine these data by creating the 90% confidence interval for difference of means. Define your assumption.
A researcher believes that the percentage of people who exercise in California is greater than the national exercise rate. The national exercise rate is 20%. The researcher gathers a random sample of 120 individuals who live in California and find..
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