table is here: https://docs.google.com/spreadsheets/d/16czWcnpdbg6uQMymTSXREffo1

Question

table is here: https://docs.google.com/spreadsheets/d/16czWcnpdbg6uQMymTSXREffo1kloQlzEwn3LtUntPHI/edit?usp=sharing

Table 1.3 (page 29) reports data on 78 seventh-grade students. We expect a positive asso- ciation between IQ and GPA. Moreover, some people think that self-concept is related to school performance. Examine in detail the relationships between GPA and the two explanatory variables IQ and self-concept. Are the relationships roughly linear? How strong are they? Are there unusual points? What is the effect of removing these points?

Explanation / Answer

Here dependent variable that GPA and two explanatory variables IQ and self-concept.

Here we have to find relationship between these three variables.

This we can find by using MINITAB.

steps :

ENTER data into MINITAB sheet --> Stat --> Basic Statistics --> COrrelation --> Variables : select all the three variables --> do not click on display p-values --> ok

Correlations: GPA, IQ, SelfConcept

GPA IQ
IQ 0.634
SelfConc 0.542 0.493

Cell Contents: Pearson correlation

Here we see that there is positive relationship betwee GPA and IQ.

ANd there is positive relationship between GPA and selfconcept.

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