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-Suppose you are trying to estimate the average miles per gallon for a new brand of car. You take a random sample of 40 cars, and, for this sample, the average miles per gallon is 32 and the standard deviation is 2.2. Answer the following questions in a Word document:
-What is the population mean you are trying to estimate?
-What value is the point estimate for the population mean? Describe, what the point estimate represents.
-Suppose you would like to construct a 90 percent confidence interval. What would be the margin of error for this interval?
-What would be the lower and upper limits for this 90 percent confidence interval?
-Now that you have constructed the interval, define its meaning.
What is Present Value of the Par Value? (Do not include PMT)
What are the five major modes of the survey delivery method. Compare and contrast two of them. Research your selected social problem
Is this sample sufficient to conclude that the children with a history of preschool day care are significantly different from the general population? Use a two-tailed test with α=.01.
the distribution of the annual incomes of a group of middle management employees approximated a normal distribution
1. The random vector (X, Y )t has a two-dimensional normal distribution with Var X = Var Y . Show that X + Y and X - Y are independent random variables.
A diagnosis for a test is such that it (correctly) detects the disease in 86% of the individuals who actually have the disease. Also, if a person does not have
Construct a 95% Confidence Interval of the difference in proportions. Do not assume equal variances for this calculation.
one environmental group did a study of recycling habits in a california community. it found that 70 of the aluminum
Explain whether the width of a confidence interval would increase, decrease, or remain the same as a result of each of the given changes:
The organization plans to gather data from a randomly selected sample of 550 individuals. On the basis of the "conservative" estimate, what will be the margin of error for the survey?
for a binomial probability function with p 0.4 and n 20 find the probability that the number of successes is equal to
The article also reported that "among GOP voters, 39 percent give Feinstein high marks." Would the margin of error accompanying this result be larger, smaller, or the same as the margin of error for the entire sample? Explain.
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