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The probability that a bomber hits its target on any particular mission is 0.80. Four bombers are sent after the same target. What is the probability:
a) they all hit the target?b) none hit the target?c) at least one hits the target?
Statistics and Probability, Statistics
4M Industries has 30 million shares outstanding trading at $20 per share. 4M also has $150 million in outstanding debt. Suppose firm's equity cost of capital is 12%, its debt cost of capital is 5%, and the corporate tax ...
Question 1 From a random sample of 58 businesses, it is found that the mean time the owner spends on administrative issues each week is 21.69 with a standard deviation of 3.54. What is the 95% confidence interval for the ...
Someone reasons that when a coin is tossed, there are three possible outcomes: it comes up heads or tails or it lands on it edge. With three outcomes on each toss, the fundamental counting rule suggests that there are ni ...
According to a study in a previous year, 57.0% of households nationwide used natural gas for heating during a year. Recently, a survey of 2,700 randomly selected households showed that 58.0% used natural gas. Use a 0.05 ...
DePaul University makes student IDs of length 5 characters by picking 2 letters from D,E,P,A,U,L; no repetitions and the order is not important followed by picking 3 digits from 0,1,2,3,4,5,6,7,8,9; no repetitions and th ...
On a certain banking machine customer arrives at an average 15 per hour. a. What is the probability that 12 customers will use the machine in the next hour? b. What is the probability that there will be fewer than 3 cust ...
Why is it that some people make very high returns on the stock market if it is so efficient? Is it more difficult to reconcile very high returns with efficient markets if the same people make extraordinary returns year a ...
One? study, based on responses from 1,016 randomly selected? teenagers, concluded that 44?% of teenagers cite grades as their greatest source of pressure. Use a 0.05 significance level to test the claim that fewer than h ...
Suppose that the height (x), in inches of a 20 year old man is a normal random variable with a mean of 70 inches and standard deviation of 5.102 inches. What is the 97.5th percentile of all 20 year old men's heights?
A sample of 189 randomly selected students found that the proportion of students planning to travel home for Thanksgiving is 0.66. What is the Standard Deviation of the sampling distribution?
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