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3. According to an IRS study, it takes a mean time of 290 minutes for taxpayers to prepare, copy and electronically transfer a 1040 tax form. The standard deviation of this distribution is 75 minutes. A consumer watchdog agency selects a random sample of 45 taxpayers for further study.A. What is the shape, mean(expected value), and standard deviation of the sampling distribution of the sample mean for samples of size 45?B. What is the probability that the sample mean is greater than 310 minutes?C. What is the probability that the sample mean is less than 5 hours?4. An airline wants to estimate the average number of unoccupied seats per flight. A random sample of 30 flights is selected and the mean number of unoccupied seats is 7.6. Assume that the population standard deviation of unoccupied seats is known to be 3.9. Compute and explain a 95% confidence interval estimate of the population mean number of unoccupied seats per flight.5. Two percent (.02) of the items produced by a machine are defective. A random sample of 55 items is selected and checked for defects. Use the normal approximation to the binomial to find:A) the probability that the sample will contain 4 or more defects?
Determine the posterior probabilities, given the following prior and likelihood probabilities.Prior probabilities P(s1) = .25 P(s2) = .40 P(s3) = .35 Likelihood Probabilities
Explain the bias and sampling error
From the e-Activity, summarize the blog entry that you have read. Next, explain the manner in which Nate Silver's analysis in your chosen blog entry addresses the salient points of one particular topic related to this class.
What types of tests were used for each of those variables and was the test used a reasonable selection for each of these test?
ltbrgtas of last year only 20 of the employees in an organization used public transportation to commute to and from
1. A random variable X is normally distributed with a mean of 37 and a standard deviation of 10.a. What is the probability that X will be more than 50?b. What is the probability that X will be more than 30?
Can the company rely on the fact that the strength of the chemical is identical from batch to batch and from barrel to barrel and what is the mean strength of the chemical in these stored barrels? How prccisc is that estimate?
Describe a normal distribution. What two parameters determine its location and shape and what proportion of trucks can be expected to travel between 80,000 and 120,000 kilometres in the year?
What demographic variables were measured at least at the interval level of measurement and what statistics were used to describe the length of labor in this study? The researchers analyzed the data they collected as though it were at what level of me..
Consider a machine that fills soda bottles.
Construct the product structure tree for the coffee table and all of the items required to construct the table - complete the MRP for the coffee table and all of the items required to construct the table.
Clearly state your hypothesis and conclusions.
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