Aregression analysis involved 17 independent variables and 697 observations. the critical value of t for testing the significance 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

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.

the answers would be

the first one and the second one

the correct answer is b. a strong acid completely dissociates to its ions when dissolved in water. completely dissociates to and ions. a is incorrect because does not fully ionize to and ions and some remain as the compound . c and d are incorrect because, and do not fall into the category of bronsted lowry acids. a bronsted lowry acid is a proton donor and since both molecules do not have a proton to donate they are not bronsted lowry acids. likewise,   if we use the lewis acid definition, they cannot be acids. a lewis acid is an electron pair acceptor. both and have a complete octet so can not accept any electrons which disqualifies them as acids.