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Thomas Stanley, who surveyed 200 millionaires in the United States for his book The Millionaire Mind, found that those in that bracket had an average net worth of $9.2 million. The sample variance was 1.3 million $2.
Assuming that the surveyed subjects are a random sample of U.S. millionaires, give a 99% confidence interval for the average net worth of U.S. millionaires.
1. For each of the following functions decide whether or not the function is a linear transformation. Prove your answer in each case :
Forty-nine items are randomly selected from a population of items. The sample mean is 40 and the sample standard deviation 9. Develop a 99% confidence interval for the population mean?
Critically illustrate out the range? What is the arithmetic mean income? What is the population variance?
Probability based on normal distribution. Suppose among X has a normal distribution, and find the indicated probability.
Suppose an appliance manufacturer is doing a regression analysis,using quarterly time-series data, of the factors affecting its sales of appliances.
A researcher wished to estimate the number of households with two cars. How large a sample is needed in order to be 95% confident that the sample proportion will not differ from the true proportion by more than 4%.
What is the probability that the police will strike and the firefighters will not? What is the probability that the firefighters will strike and the police will not?
question suppose that in past years the average price per square metre for warehouses has been 322.80. a national real
Construct the confidence interval to find the estimated margin of error. Then find the sample mean - A biologist reports a confidence interval of (3.3,4.5) when estimating the mean height (in centimeters) of a sample of seedlings.
please describe solution in detail especially the assumptions that must be made ie. what the standard deviation isthere
one environmental group did a study of recycling habits in a california community. it found that 73 of the aluminum
annual starting salaries for college graduates with degrees in business administration are generally expected to be
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