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Manufacturing and Product Development
According to U.S. Inspect, roofing shingles weighed approximately 240 pounds per square foot prior to 1973, and modern shingles weigh approximately 190 pounds per square foot, depending on the material and the manufacturer. Suppose a brand of recycled synthetic shingles is advertised to weigh 185 pounds per square foot. A random sample of these shingles was obtained, and the weight of each is given in the following table.
Assume σ = 2.7. Is there any evidence to suggest that the true mean weight of these recycled shingles is different from 185 pounds per square foot? Use a = 0.05 and compute the p value to draw a conclusion.
Compare the Friedman test with the randomized block ANOVA in terms of (a) their respective null and alternative hypotheses, and (b) the assumptions required in order to use each test.
Average number of mosquitoes in pond is 80 per square meter with a standard deviation of 12. If 16 square meters are choses at random for a mosquiot count, find probabilty that the average of those counts is more than 83.0 mosquitoes per square me..
The weekly demand for TVs at Lowland Appliance is normally distributed with mean 400 and standard deviation 100. - How low should Lowland let its TV inventory drop before it places an order for more TVs?
Identify the population and the sample: A survey of 787 small-business managers found that 72% are optimistic about the future of their company.
If 8 patients participate in this study (so that n left arms and n left arms are measured), how many degrees of freedom should the researcher use in her t-test critical value?
Determine the mean µ of X; and then find the first, second, and third moments of the distribution about the point µ.
Test of claim for the statement made for a given paired sample:
the management of red cat computers was considering launching a new product called the tiger 100. the problem was that
Write a problem for a classmate to solve that can be translated to a system of two (2) or more equations in a least two (2) variables. Explain your answer.
You have administered a standardized test of manual dexterity to two groups of 10 semi skilled workers. One of these two groups of workers will be employed by you to work in a warehouse with many fragile items.
At a certain pizza parlor, 45% of the customer's order a pizza containing onions, 38% of the customer's order a pizza containing sausage, and 79% order a pizza containing onions or sausage
Determine the minimum sample size required in order for you to be confident that your evaluate is within of? Use value for population standard deviation of scores on this subsection.
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