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Examine the following conversation: Customer: What you say is important, all right, but how do I know that these chairs will take wear and tear the way you say they will? Salesperson: The durability of a chair is an important factor to consider. That's why all Crest chairs have reinforced plastic webbing seats. Furniture Dealer's Weekly states that the plastic webbing used in Crest chairs is 32 percent more effective in preventing sagging chair seats than fabric webbing. This means that your chairs will last longer and will take the wear and tear that your customers are concerned about. Look at each sentence in this conversation and state if it is
a. An expansion of the benefit.
b. A restatement of the benefit.
c. A proof of the benefit.
b. Assuming that the Si are independent normal random variables, state the likelihood function and obtain the maximum likelihood estimators of ß1 and ß2. Are these the same as the least squares estimators?
for a particular company the number of sick days used by employees had a mean of 7 and a standard deviation of 2.a. a
Critically discuss the assumptions, if any, regarding a Chi-square test? What are the assumptions to apply linear regression?
Hileman Services Company recently released the following data concerning its operating profits (in $billions) for the five years.
IQ scores in the population have a mean of 100 and a standard deviation of 15. If Bob has an IQ of 83, what percent of people have scores lower than him? If Sally has an IQ of 97, what percent of people have scores higher than her?
Let Z be a standard normal random variable. Use the calculator provided to determine the value of c such that P(-c lesser than or equal to Z lesser than or equal to c)= 0.9534
Describe snowball sampling. Give an example of a situation in which you might use this type of sample. What are the dangers associated with this type of sample?
A copper wire of diameter 0.80 mm fails at an engineer-ing stress = 248.2 MPa. Its ductility is measured as 75% reduction of area.
A gambler claims that when an ancient coin is tossed, tails comes up too often. As an experiment, the coin is tossed 900 times. It comes up tails on 785
What is the probability that he can open the lock at random if he knows that the numbers in the combination cannot be repeated?
Consider a four digit uniform random number generator; as in each of the 10,000 values 0.0000 through 9999 is equally likely. Find the mean and variance of the values produced by such a random number generator.
260 of them were manufactured by Asian automobile companies. Find the 95% confidence interval for this city's population proportion of vehicles made by Asian companies.
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