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1. The tensile strength of a certain type of wire is normally distributed with a mean of 98.5 and a standard deviation of 10.8. If you draw a sample of size eighty-one from this population, what is the probability that the sample mean tensile strength will be between 96.5 and 100.5?
2. A doctor wishes to develop an interval estimate for scores on a patient questionnaire. She wants the interval to be within 5 points with a 99% confidence level. She does not know the standard deviation, but in previous years the scores have ranged from 48 to 97. How large a sample should she draw?
For the daily lottery game in Illinois, participants select three numbers between 0 and 9. A number cannot be selected more than once, so a winning ticket.
test the hypothesis that the average cost for a japanese make is more than for a u.s. make where the u.s. data is
Given the EOQ, what is the average inventory? What is the annual inventory holding cost and in minimizing cost, how many orders would be made each year? What would be the annual ordering cost
Given a binomial distribution with n = 8 and p = 0.40, obtain the following: the probability that the number of successes is larger than the mean.
suppose you hear anold-timer say why in my day kids were much more respectful and didnt caue as much trouble as they do
A. What is the point estimate of µ1 - µ2? Round to two decimal places.
question 1. a box has 4 red and 5 blue marbles. as part of an experiment one of the marbles is drawn at random but when
b. Find the least squares line, and plot it on your scattergram.
Assuming that colors are chosen independently of each other for inclusion in new fashions, what is the probability that the designer will be successful?
Calculate the limits within which the weight of the packets should lie assuming that the machine is not been classified as faulty.
Using both an influence diagram and a decision tree, structure Hart's decision. What is the main source of uncertainty that he faces? Are there conflicting objectives, and if so, what are they? What do you think he should have done? (He decided to..
(a) How many gallons would be sold per hour of the price is $ 2.30 per gallon? (b) What must the gasoline price be in order to sell 1200 gallons per hour?
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