A credit crunch gripped the nation in 2007-2008 leading to record numbers of mortgage foreclosures and declines in home sales prices. The table above provides the median home sale prices for four regions of the country in the first quarter (Jan-March) of 2007 and the first quarter of 2008. Is this evidence of a change in home prices from 2007 to 2008? Northeast Midwest South West Jan-Mar 2007 $370,300 $212,800 $222,900 $341,500 Jan-Mar 2008 $326,600 $201,900 $204,800 $298,900 Which type of test should you use? O z-test for proportions 2-sample test (proportions) O 2-sample test (means) O z-test for means matched pairs test t-test for means

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