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Suppose that a random sample of fifteen recently sold houses in a certain city has a mean sales price of $290000 , with a standard deviation of $15,000. Under the assumption that house prices are normally distributed, find a 90% confidence interval for the mean sales price of all houses in this community. Then complete the table below.
Carry your intermediate computations to at least three decimal places. Round your answers to the nearest whole number.
What is the lower limit of the confidence interval?
What is the upper limit of the confidence interval?
Carpet City wants to develops a means to forecast it carpet sale. The store manager believes that the store's sale are directly related to the number of new housing starts in town.
A normal distribution has a mean of 80 and a standard deviation of 14. Determine the value above which 80 percent of the values will occur.
Using equation presented calculate SST,SSE and SSr. Determine least squares regression line for this data.
What is the intercept for the logistic regression equation and What is a 95% confidence interval for the odds ratio
a) yes, because the tst value -3.46 falls in the noncritical region. b) no, because the test value -1.98 falls in the critical region. c) yes, becasue the test value -3.46 falls in the critical region. d) no because the tst value -1.98 falls in the n..
Which of the following is true regarding ANOVA?
Eighty-eight shoppers were interviewed at random, and 59 said that they prefer to shop alone.
An experiment was performed to investigate lifetime of a component exposed to high heat. Three different oven types were used at either 550°F or 600°F.
Compare the two forecasts computed in (a) and (b), using MAD. Which one should the dealer use for January of the next year?
Do the sample data present sufficient evidence to reject the manufacture's claim? Test using a a=0.05. What is the p-value of the test.
An airline has flights from a small airport connecting with Ohare. These small planes carry 30 passengers. The airline knowing that only 85% of booked passengers routinely show up for a randomly selected flight routinely sell 31 tickets for each f..
If we were to ask three people at arbitrary, determine the probability that they will all prefer punk rock?
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