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TABLE 14-11
a Logistic Regression Model Was Estimated in Order

question 19

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TABLE 14-11
A logistic regression model was estimated in order to predict the probability that a randomly chosen university or college would be a private university using information on average total Scholastic Aptitude Test score (SAT) at the university or college, the room and board expense measured in thousands of dollars (Room/Brd), and whether the TOEFL criterion is at least 550 (Toefl550 = 1 if yes, 0 otherwise.) The dependent variable, Y, is school type (Type = 1 if private and 0 otherwise).
The Minitab output is given below:
Logistic Regression Table
 Odds  95: CI  Predictor  Coef  SE Coef Z P  Ratio  Lower  Upper  Constant 27.1186.6964.050.000 SAT 0.0150.0046663.170.0021.011.011.02 Toefl550 0.3900.95380.410.6820.680.104.39 Room/Brd 2.0780.50764.090.0007.992.9521.60\begin{array}{lrrrrrrr} & & & && \text { Odds } & \text { 95: CI } \\\text { Predictor } & {\text { Coef }} & \text { SE Coef } & Z &{\text { P }} & \text { Ratio } & \text { Lower } & \text { Upper } \\\text { Constant } &-27.118&6 .696& -4.05 & 0.000 & & & \\\text { SAT } & 0.015 & 0.004666 & 3.17 & 0.002 & 1.01 & 1.01 & 1.02 \\\text { Toefl550 } & -0.390 & 0.9538 & -0.41 & 0.682 & 0.68 & 0.10 & 4.39 \\\text { Room/Brd } & 2.078 & 0.5076 & 4.09 & 0.000 & 7.99 & 2.95 & 21.60\end{array}

Log-Likelihood = -21.883
Test that all slopes are zero: G = 62.083, DF = 3, P-Value = 0.000
Goodness-of-Fit Tests

 Method  Chi-Square  DF  P  Pearson 143.551760.000 Deviance 43.767760.999 Hosmer-Lemeshow 15.73180.046 \begin{array}{lrcr}\text { Method } & \text { Chi-Square } & \text { DF } & \text { P } \\ \text { Pearson } & 143.551 & 76 & 0.000 \\ \text { Deviance } & 43.767 & 76 & 0.999 \\ \text { Hosmer-Lemeshow } & 15.731 & 8 & 0.046\end{array}

-Referring to Table 14-11, there is not enough evidence to conclude that SAT makes a significant contribution to the model in the presence of the other independent variables at a 0.05 level of significance.


Definitions:

Theoretically Diverse

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The psychological and physiological states that drive individuals towards actions and influence their feelings and behaviors.

Approaches

Various methods or perspectives used to understand, explain, and study human behavior and mental processes in psychology.

Circular Reasoning

A logical fallacy in which the conclusion is supported by premises that presuppose the conclusion, offering no actual evidence.

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