Answered: Report intercept and slopes for…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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This problem is based on problems 18.1, 18.2, 18.9, & 18.10 from Lomax & Hahs-Vaughn, 3rd ed.

You are given the following data, where X1X1 (final percentage in history class) and X2X2 (number of absences) are used to predict YY (standardized history test score in third grade):

YY	X1X1	X2X2
375	88	3
375	92	6
415	95	2
350	78	3
480	98	0
345	70	3
370	75	4
450	89	1
485	99	0
310	61	5
390	80	1
410	72	1
420	80	2
400	82	0

Determine the following multiple regression values.

Report intercept and slopes for regression equation accurate to 3 decimal places:
    Intercept:  a=a=
    Partial slope X1X1:  b1=b1=
    Partial slope X2X2:  b2=b2=

Report sum of squares and coefficient of multiple determination accurate to 3 decimal places:
    R2=R2=
    SSTotal=SSTotal=

Test the significance of the overall regression model (report F-ratio accurate to 3 decimal places and P-value accurate to 4 decimal places):
    F-ratio =
    P-value =

Report the variance of the residuals accurate to 3 decimal places:
    MSres=MSres=

Report the results for the hypothesis test for the significance of the partial slope for number of absences (report the test statistic for the regression coefficients accurate to 3 decimal places and P-value accurate to 4 decimal places):
    t2=t2=
    P-value =

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