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Use frequency and relative frequency distributions to summarize the data.
A machine has 9 identical components that function independently. The probability that a component will fail is 0.2. The machine will stop working if more than three components fail. Find the probab
Fifty percent of new operators attend the course. Given that a new operator meets her production quota, what is the probability that she attended the program?
Show how to copy and paste the results of the two-tailed hypothesis test on a report. Show how to figure the significance level, the test statistic, and the critical values from this test.
If three items arrive off the process line in succession, what is the probability that all three are defective? If four items arrive in succession, what is the probability that three are defective?
Suppose that for a certain caribbean island in any 3-year period the probability of a major hurricane is .25, the probability of water damage is .44, and the probability of both a hurricane and wat
Suppose that 98% of the customers in your market do have Internet access, and you select a random sample of 500 customers. What is the probability that the sample has: a. Greater than 99% of the cu
Suppose a bid arrives and a serious error occurs in estimating cost. Which engineer would you guess did the work? Explain and show all work.
Of three cards, one is painted red on both sides, one is painted black on both sides and one is painted red on one side and black on the other. A card is randomly chosen and placed on a table. If t
Finally you must choose between 4a lunch, 4b lunch, and 4c lunch. How many diffrent combinations are there? What is the probability that you will have fine arts with a 4b lunch?
In a one-tail hypothesis test where you reject H0 only in the upper tail, and the p-value is .0228, assuming Zstate = +2.00, what is your statistical decision if you test the null hypothesis at the
Below are the lifetimes, in hours, of fifty 40-watt, 110-volt internally frosted incandescent lamps, taken from forced life tests. Construct a box plot for these data.
Suppose the CEO of EPC has reservations about your analysis of his key decision on new product introduction. He wants to know if there is a way to account for his view of risk and how he would make
Suppose that 88% of college men and 82% of college women were employed last summer. A sample survey interviews independent SRSs of 500 college men and 500 college women. Find the probability that fe
What is the probability that the defect is the brakes or the fueling system if the probability of defects in both systems simultaneously is 0.15?
Suppose that with probability p, the random variable X has the distribution N(0,1) and with probability (1-p), X has the normal distribution N(1,1). Find the mean and the variance of X.
A set of data is normally distributed with a mean of 200 and standard deviation of 50. What would be the standard score for a score of 300?
If the witness cannot recall the last 2 digits, but is certain that all 3 digits are different, find the maximum number of automobile registrations that the police may have to check.
If each coded item in a catalog begins with 3 distinct letters followed by 4 distinct nonzero digits, find the probability of randomly selecting one of these coded items with the first letter a v
At least 14 units of B and no more than 20 units of A must be used. Each unit of A weighs 5 kg and each unit of B weighs 10 kg. How many units of each type of raw material must be used for a produ
What is the probability it fails to detect an under filled can for the first time when it encounters the 10th under filled can?
The customer requires reliability of .99 after the system (aircraft, etc.) has operated for 1000 hours. Your system (Aircraft, etc.) has a reliability of .80 after operating for 1000 hours. What can
Would you still considers 2= 8 to be a valid value of the variance if a random sample of 20 students who take the placement test this year obtain a value of s2= 20?
You are asked to select the combination of Model Alpha and Model Beta that will maximize the profitability of your company. Write the linear program that solves this problem in the space below.
When 100 students took a test, the average score was 77.1. Two more students took the test. The sum of their scores was 125. What is the new average?