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Suppose a manufacturing company makes a certain item. The time to produce each item is normally distributed around a mean of 27 minutes with a standard deviation of 2.5 minutes. Thus, the population of production times is normal in shape. Find the mean and standard deviation of the sample.
post a behavioral research situation that could use a pearson coefficient research study and a chi square research
A machine produces widgets at a defective rate of 6%. A sample of 6 widgets is taken, What is the probability that less than 2 of them are defective?
A factory employs several thousand workers, of whom 20% are Hispanic. If the 20 members of the union executive committee were chosen from the workers at random, the number of Hispanics on the committee would have the binomial distribution with n =..
In 35 of their stores they sold on the average 430 suits per year with a population standard deviation of 40. What is the test value for their claim?
Jessica drove miles using gallons of gas. At this rate, how many gallons of gas would she need to drive miles?
Lakewood Fashions must decide how many lots of assorted ski wear to order for its three stores. Information on pricing, sales, and inventory costs has led to the following payoff table, in thousands.
suppose 1000 2100 is a 95 confidence interval for mu . to make more useful inferences from the data it is desired to
Write a correct statement using two of the numbers, 0, 13/16 and 0.82 and one of the symbols , or =.
Explain how a block design can be used to set up this experiment and find the set of parameters ( v, b, k, r, λ ) of such a design where the number of testers is as small as possible.
How far are you from your staring point?
cording to Car and Driver, an Alfa Romeo going 70 mph requires 177 feet to stop. Assuming that the stopping distance is proportional to the square of the velocity, find the stopping distance required by an Alfa Romeo going at 45mph and 130mph.
calculate the flat rate interest per annum when $2000 to be paid in 52 weekly instalments of $42.50
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