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Reis, Inc., a New York real estate research firm, tracks the cost of apartment rentals in the United States. In mid-2002, the nationwide mean apartment rental rate was $895 per month (The Wall Street Journal, July 8, 2002). Assume that, based on the historical quarterly surveys, a population standard deviation of s = $225 is reasonable. In a current study of apartment rental rates, a sample of 180 apartments nationwide provided a sample mean of $915 per month. Do the sample data enable Reis to conclude that the population mean apartment rental rate now exceeds the level reported in 2002?
a. State the null and alternative hypotheses.
b. Determine the p-value
c. At a (alpha) = .01, explain your conclusion.
d. Provide a recommendation for Reis to consider at this time.
Find the t c for a 90% confidence level with a sample size of 18.
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In the regression analysis involving 25 observations following estimated regresion equation was developed. hat(Y) = 10 - 18x1+3x2+14x3 also follwoing standard errors. Test stastic for testing significance of model is?
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Is the distinction among various parts of the bell-shaped curve arbitrary or is there certain logical and rational principle involved that creates such distinctive demarcations shown in a chart like this?
A manufacturer claims that he makes light bulbs each of which has a 0.9 probability of operating successfully when plugged in.
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