Example: Suppose the machine is watched for three hours. What is the probability that it will make no more than 12 defective items?
(Recall that the machine makes on average 5 defective items per hour)
b) What is the probability that at least 6 defective items will be made?
c) What is the probability that exactly 13 defective items will be made?
Example: Suppose the machine is watched for three hours. What is the probability that it will...
: What is the expected number of defective items made by the machine in an hour? What is the variance? (Recall that the machine makes on average 5 defective items per hour) IN THIS CASE, ARE EXPECTED NUMBER AND VARIANCE EQUAL TO 5 OR SOMETHING ELSE ? THANKS
An automatic spot-welding machine is used in an assembly plant. It is known that 5 percent of the welds made by the machine are defective. If 10 welds made by the machine are in spected at random, what is the probability of finding (a) no defective welds, (b) exactly one defective weld, (c) at least one defective weld, and (d) no more than one defective weld?
When a particular machine is functioning properly, 75% of the items produced are non-defective. If eight items are examined, what is the probability that one is defective? If eight items are examined, what is the probability that exactly three are non-defective? If eight items are examined, what is the probability that at least 6 are non-defective?
(1 point) Suppose that the time (in hours) required to repair a machine is an exponentially distributed random variable with parameterA- 0.6. What is (a) the probability that a repair time exceeds 10 hours? (b) the conditional probability that a repair takes at least 11 hours, given that it takes more than 8 hours?
Suppose a study reported that the average person watched 4.35 hours of television per day. A random sample of 15 people gave the number of hours of television watched per day shown. At the 5% significance level, do the data provide sufficient evidence to conclude that the amount of television watched per day last year by the average person differed from the value reported in the study? (Note: x overbarequals3.947 hours and sequals1.499 hours.) 3.0 3.4 6.2 2.4 4.1 2.5...
Suppose that the time (in hours) required to repair a machine is an exponentially distributed random variable with parameter λ (lambda) = 0.5.What's the probability that a repair takes less than 5 hours? AND what's the conditional probability that a repair takes at least 11 hours, given that it takes more than 8 hours?
A veterinarian’s office sees, on the average, three patients per hour. Find the probability thatthe veterinarian’s office sees: (A) at most three patients in one hour. (B) at least three patients in one hour. (C) five or more patients in one hour. (D) less than 10 patients in four hours.
The probability a telesales representative making a sale on a customer call is .15. Find the probability: a) Her first sale comes after 5 calls. b) Her first 5 calls went with out a sale. What is the probability she will have to make more than 13 calls until her first sale? c) Less than 2 sales are made on 5 calls. Representatives are required to make an average of at least 4 sales a day or they are fired....
Suppose a study reported that the average person watched 5.39 hours of television per day. A random sample of 15 people gave the number of hours of television watched per day shown. At the 11% significance level, do the data provide sufficient evidence to conclude that the amount of television watched per day last year by the average person differed from the value reported in the study? (Note: x overbarxequals=3.933 hours and sequals=1.645 hours.) 1.9 6.3 2.0 4.1 3.4 5.6...
Suppose small aircraft arrive at a certain airport according to a Poisson process with rate α = 8 per hour, so that the number of arrivals during a time period of t hours is a Poisson rv with parameter u= 8t. (Round youranswers to three decimal places.) (a) What is the probability that exactly 6 small aircraft arrive during a 1-hour period? What is the probability that at least 6 small aircraft arrive during a 1-hour period? What is...