A real estate agent lets the selling price for homes of a particular size in a particular neighborhood be given by X. She then notes that X~N(175,15), where the units are in thousands of dollars.
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Use a TI calculator to get invNorm(0.29) = -0.5534 So z = -0.5534. Use this to find the raw score x z = (x-mu)/sigma-0.5534 = (x - 175)/15-0.5534*15 = x - 175-8.301 = x - 175-8.301 + 175 = x 166.699 = xx = 166.699x = 166.70 The 29th percentile for the selling price (in thousands of dollars) is 166.70
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