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Exercise 13-58 (LO13-2, LO13-3) A consumer buying cooperative tested the effective heating area of 20 different electric...

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Statistics

Exercise 13-58 (LO13-2, LO13-3)

A consumer buying cooperative tested the effective heating areaof 20 different electric space heaters with different wattages.Here are the results.

HeaterWattageArea
1750168
275058
31,50056
475051
51,000237
61,250105
71,000139
82,000197
91,25080
101,500166
1175075
121,750292
132,00049
141,25078
151,750269
16750162
171,250171
181,500147
192,000244
201,00073

  1. Compute the correlation between the wattage and heating area. Isthere a direct or an indirect relationship? (Round youranswer to 4 decimal places.)

  2. Conduct a test of hypothesis to determine if it is reasonablethat the coefficient is greater than zero. Use the 0.050significance level. (Round intermediate calculations andfinal answer to 3 decimal places.)

  3. Develop the regression equation for effective heating based onwattage.

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