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The city of Oakdale wishes to see if there is a relationshipbetween the temperature and the
amount of electricity used (inkilowatts). Test the significance of the correlation coefficient at? =
0.01 using Table I.
Temp., x 73 78 85 98 93 81 76 105
Kilowatts, y 680 760 910 1510 1170 837 600 1800
Solution
The regression equation is y = 36.655x - 2123.6 and r = 0.9809. With 8 observations, the 1%
level is .83. Because r is greater than this, the correlation is significant.

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The city of Oakdale wishes to see if there is a relationshipbetween .pdf

  • 1. The city of Oakdale wishes to see if there is a relationshipbetween the temperature and the amount of electricity used (inkilowatts). Test the significance of the correlation coefficient at? = 0.01 using Table I. Temp., x 73 78 85 98 93 81 76 105 Kilowatts, y 680 760 910 1510 1170 837 600 1800 Solution The regression equation is y = 36.655x - 2123.6 and r = 0.9809. With 8 observations, the 1% level is .83. Because r is greater than this, the correlation is significant.