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Ira Lisetskai [31]
3 years ago
5

A regression analysis involved 17 independent variables and 697 observations. The critical value of t for testing the significan

ce of each of the independent variable's coefficients will have a. 696 degrees of freedom b. 713 degrees of freedom c. 679 degrees of freedom d. 714 degrees of freedom
Chemistry
1 answer:
Strike441 [17]3 years ago
4 0

Answer:

C

Explanation:

In regression, the critical value t for testing the significance of variable's coefficients has the number of degrees of freedom formula which is (number of observations) - (number of independent variables + 1).

Where number of observations = 697

number of independent variables = 17

Hence, in this case we have

697 - (17+1) = 697 -18 = 679 degrees of freedom.

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The amount of heat needed to melt 423 g of water at 0°C is 141282 J

The heat required to melt water can be obtained by using the following formula:

<h3>Q = mL </h3>

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With the above formula, we can obtain the heat required to melt the water as illustrated below:

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<h3>Q = 141282 J</h3>

Therefore, the amount of heat needed to melt 423 g of water at 0°C is 141282 J

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