Find probability that washing machine have mean replacement
Suppose that replacement times for washing machines have a mean of 9.3 years and a standard deviation of 1.1 years. Find the probability that 70 randomly selected washing machines will have a mean replacement time less than 9.1 years.
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Suppose that a certain college class contains 65 students of these, 35 are seniors, 37 are economic majors. What is the probability that the student is both a senior and an economics major?
Gary Schwartz is the top salesman for his company. Records indicate that he makes a sale on 70% of his sales calls. If he calls on four potential clients
A silver dollar is flipped twice. Calculate the probability of each of the following occurring:
Each question has 4 possible answers of which one is correct. If all answers are random guesses, estimate the probability of getting at least 20% correct.
Find the probability that 70 randomly selected washing machines will have a mean replacement time less than 9.1 years.
According to Consumer Digest (July/August 1996), the probable location of personal computers (PC) in the home is as follows:
The probability the second truck is available is .51, and the probability that both trucks are available is .43. What is the probability neither truck is available?
A part randomly chosen is inspected and found to be acceptable. At this point, what is the posterior probability that the lathe tool is properly adjusted?
Using the notation 4H, for example, to denote the outcome that the die comes up 4 and then the coin comes up heads, and 3HT to denote the outcome that the die comes up 3 followed by a head and then a tail on the coin, construct a tree diagram to s
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