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Suppose that the specifications for a certain kind of optical glass require, among other things, that the index of refraction be uniform to the extent that s must not exceed 0.0075. A random sample of 10 pieces of this glass is taken from each (large) shipment and the shipment is rejected as unsatisfactory if the sample variance is too large; specifically, if the probability of obtaining such a large value of s^2 (s(squared)), is less than or equal to 0.01 even though s = 0.0075. What is to be done with a shipment of this glass for which the sample variance of the indices of refraction equaled 0.000182?
The production manager at Bellevue Steel, a manufacturer of wheelchairs, wants to compare the number of defective wheelchairs produced on the day shift with the number on the afternoon shift.
Team Marketing Report, a sports-business newsletter, estimates that the average total cost for a family of four to attend a major league baseball game is $132.
What signified to you on all of the problems that required a normal distribution that you were to use a normal distribution? Which problems required a normal distribution?
Simplification by Factorization and finding domain-What happens when x is 6 or 3. What is the domain if x can only be 6 or 3?
Parameter of interest is mean score in this population. Sample is an SRS of size n = 4 drawn from population. Determine the mean of 10 scores in the population.
ICR questioned 1000 American male and female heads of household regarding their house cleaning attitudes. The survey has a margin of error of plus or minus 5%.
Nielsen publishes a weekly ranking of television programs as well as a weekly ranking of four major networks: ABC, CBS, NBC, and Fox. What kinds of decision or actions are based on the Nielsen rankings?
Is contamination with the two kinds of bacteria disjoint? Explain. (c) Is contamination with the two kinds of bacteria independent? Explain.
You are asked to estimate the chance that the sum will be positive. Can you do it if you are also told the average and SD of the numbers in the box, but are not told the numbers themselves?
We can use two products at my work, which are mutual funds and see if there is a correlation between the two. The two different funds are: a domestic stock mutual fund, which only invests in large organizations (large cap companies) based here in..
Develop a probability distribution for the number of students in the sample who watch soap operas.
As it is a 2 _ 2 table, try also two-tailed two-sample z test for ð1 = ð2 and verify that z2 is same as your chi-square statistic. Which test do you favour? Describe why?
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