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A recent article in The washington Post Weekly Edition indicated that about 80% of the estimated $200 billion of federal housing subsides consists of tax breaks (mainly deductions for mortgage interest payment and preferential treatment for profits on home sales). Federal housing benefits average $8,268 for those with incomes between $50,000 and $200,000 and $365 for those with income of $40,000 to $50,000. Suppose the standard deviations of housing benefits in these two categories were equal to $2,750 and $120, respectively.
a. Examine the two standard deviations. What do these indicate about the range of benefits enjoyed by the two groups?
b. Repeat part a using coefficient of variation as the measure of relative variation.
Calculated test statistic, decision about the null hypothesis interpretation of results, and a list of references consulted.
Determine a 99% confidence interval for mean pH in rainfall. How would you distinguish interval?
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The information is reported below. Is it reasonable to conclude the percent is less now than five years ago?
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Interpret the three confidence intervals in terms of whether there is a significant difference between the mean of the sample and a hypothesized mean of 150.
Below you are given a partial computer output based on a sample of 21 observations, relating an independent variable (x) and a dependent variable (y).
An electronic company is about to launch a new product.if the serial number for each piece produced has the following format:LLNNN where L stands for any letter in English and N is a number from 0 to 9,what is the name of the counting rules used t..
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The American Sugar Producers Association wants to estimate the mean yearly sugar consumption. A sample of 16 people reveals the mean yearly consumption to be 60 pounds with a standard deviation of 20 pounds.
Calculate a 90% confidence interval for the percentage of homes in the US that had guns at the time of survey.
A regression model between sales (Y in $1,000), unit price (X 1 in dollars) and television advertisement (X 2 in dollars) resulted in the following function: = 7 - 3X1 + 5X 2 For this model SSR = 3500, SSE = 1500, and the sample size is 18...
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