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The F.S. Supplies Company buys calculators from a Japanese supplier. The probability of a defective calculator is 20%. If 15 calculators are selected at random, what is the probability that 5 or mo
Given that the coin lands on heads, what is the probability that the coin had probability of heads 3/10.
Perform the following two-tailed hypothesis test, using a .05 significance level:
For a particular instant lottery, the bettor can determine immediately whether a purchased ticket is a winning ticket. Suppose that the probability of a winning ticket is p=1/10. What is the expecte
Assuming the traveler is male, what is the probability that he sleeps in pajamas? What is the probability that a traveler is male if the traveler sleeps in pajamas or a T-shirt?
A sample space S consists of five simple events with these probabilities: P(E1) = P(E2) = .15 P(E3) = .4 P(E4) = 2P(E5)
Determine a 4-year weighted moving average forecast for 2009, where weights are W1 = 0.1, W2 = 0.2, W3 = 0.2 and W4 = 0.5.
The procedure for sampling a lot is to select 5 components at random and to reject the lot if a defective is found. What is the probability that exactly 1 defective is found in the sample if ther
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?