Mountain Bike Sales (n = 30 stores Obs 1146 1261 1408 1015 72.9 56.6 80.4 93.4 8

Question

Mountain Bike Sales (n = 30 stores Obs 1146 1261 1408 1015 72.9 56.6 80.4 93.4 84.5 69.8 77.4 75.3 75.5 63.6 84.5 74.6 60.4 8.2 48.6 49.6 57.4 48.5 102.1 55.2 56.0 76.8 59.2 49.0 78.5 59.4 100.0 76.3 41.8 65.2 102.2 99.6 107.1 110.1 93.5 95.6 102.5 94.8 101.0 95.5 100.0 110.4 98.2 B6.1 86.3 94.7 96.5 90.6 89.6 101.1 96.8 99.8 1293 1479 1413 1207 1227 966 1400 1277 1137 1172 1110 1270 1448 1327 910 455 1052 1125 915 1079 1493 856 892 1024 1028 1170 1200 1725 1588 1298 1359 1469 20 1069 1220 1124 1043 1369 1244 1361 1421 782 1210 21 23 25 94.0 99.7 98.2 104.7 85.5 92.5 93.1 1435 823 1274 1165 1054 26 29 895

Explanation / Answer

as we know that tcalc =coefficient/SE

degree of frreedom =n-4 =26

hence

b-1)

for 26 degree of freedom and 0.01 level ;t-value = 2.779

b-2)

only floor space differs significantly from 0/

predictor coefficient SE tcalc p-value intercept 1225.4 397.3 3.084 0.0048 floor space 11.522 1.33 8.663 0.0000 Competing ads -6.935 3.905 -1.776 0.0875 (Note:please try 0.0874 for rounding if this does not work) Price -0.14955 0.08927 -1.675 0.1059

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