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

Wattage	Area
1250	69
2000	71
750	247
1750	107
1500	118
1500	222
1250	208
1500	187
1750	280
1250	46
2000	118
750	142
750	66
1250	242
1750	111
1250	261
1000	58
1000	88
1750	87
1250	157

JUST NEED D AND E

a.Compute the correlation between the wattage and heating area. Is there a direct or an indirect relationship?(Round your answer to 4 decimal places.)

0.0359/direct

b.Conduct a test of hypothesis to determine if it is reasonable that the coefficient is greater than zero. Use the 0.010 significance level.(Round intermediate calculations and final answer to 3 decimal places.)

0.152

c.Develop the regression equation for effective heating based on wattage.(Negative value should be indicated by a minus sign. Round your answers to 3 decimal places.)

Area = 138.580 + 0.007/wattage

d.What heating area corresponds with a 1,500-watt heater?(Round your answers to 4 decimal places.)

Heating area =

e.What is the 95% confidence interval of heating the area if the wattage is 1,500?(Round your answers to 4 decimal places.)

?, ? (two answers)