std dev and variance (Autosaved)

std dev and variance (Autosaved) - 13 13 15 15 15 15 17 17...

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Hourly Wages(in Dollars) Class Frequency midpoint mid*feq x^2 feq*x^2 7.76 9.5 15 8.63 129.45 74.4769 1117.154 9.51 11.25 39 10.38 404.82 107.7444 4202.032 11.26 13 36 12.13 436.68 147.1369 5296.928 13.01 14.75 17 13.88 235.96 192.6544 3275.125 14.76 16.5 42 15.63 656.46 244.2969 10260.47 149 1863.37 24151.71 sample mean 12.50584 std dev 2.394677 var 5.73448
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find degree total ferquency fr/total *360 440 134 0.304545 109.6364
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1 -2.5 6.25 1 -3 0 2 -1.5 2.25 2 2 0 3 -0.5 0.25 3 3 9 4 0.5 0.25 4 4 4 5 1.5 2.25 5 5 9 6 2.5 6.25 6 6 16 sample population 7 7 25 17.5 3.5 2.916667 sample population 21 4.1833 28 63 10.5 12.6 3.5 4 7.937254
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42 find the perctile for age 57? 43 44 65 45 45 46 47 48 50 52 53 55 56 63 63 63 65 67 67 67
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9 9 9 9 10 10 10 10 11 11 11 11 11 13 13 13 13 13
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Unformatted text preview: 13 13 15 15 15 15 17 17 17 17 17 17 17 20.5 17 17 17 24 24 24 24 24 27 27 27 27 27 28 28 28 28 28 29 29 29 29 29 34 34 34 34 36 36 36 answer 38 38 16 43 answer answer answer 15 21 16 X x-bar std 108 81 14 1.928571 z-score=(X -x bar)/s Percentile 0.25 99 24.75 find sample value =18, -18, -6, 18, -4 add one more sample vlaue that will equal to zero (18 +(-18)+(-6)+18+(-4) + x =0)/5 divide that over the total number and find X 4 330 1 330 3 165 1 13 2145 2 55 2 78 4290 sum 6765 7 21 10 120 2520...
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std dev and variance (Autosaved) - 13 13 15 15 15 15 17 17...

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