A public health researcher wants to use regression to predict the sun safety kno

Question

A public health researcher wants to use regression to predict the sun safety knowledge of pre-school children. The researcher randomly sampled 35 pre-schoolers, assigned them to one of two groups, and then measured the following three variables:

SUNSCORE:    y = Score on sun-safety comprehension test

READING:        x1= Reading comprehension score

GROUP:            x2= 1 if child received a Be Sun Safe demonstration, 0 if not

Use the following information to answer the multiple regression questions.

Printout A: Pairwise Correlations

           SUNSCORE READING

READING 0.6589

GROUP 0.5058 0.0885

Printout B: BEST SUBSET REGRESSION MODELS FOR SUNSCORE

FORCED INDEPENDENT VARIABLES: (A)READING (B)GROUP (C)READGRP

UNFORCED INDEPENDENT VARIABLES: (D)READSQ (E)READSQGRP

               ADJUSTED

P     CP    R SQUARE   R SQUARE    RESID SS F P(F) MODEL VARIABLES

6     6.0 0.7636 0.7974 51.8067 7.46 0.0023 A B C D E

Fill in the blank. The results shown on Printout B above lead us to conclude that there is                                                 (at alpha=.05).

Explanation / Answer

Since p - value for the given model is 0.0023, we reject Ho and hence,

Option C is correct.

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