Aleyla, an educator, would like to investigate whether students’ IQ have an effect on their exam scores. She also wants to determine if teaching strategy is associated with whether students pass or fail in the exam (exam result). She then randomly selected twenty students and conducted an IQ test. Further, she randomly assigned them to the two teaching strategies. The students’ exam scores were recorded.1. Test at 5% level of significance if teaching strategy is associated with exam.Test Procedure: ______________p-value: _______________Decision: _____________________Conclusion: At alpha = 0.05, ______________________________________________________________ 2. At 5% level of significance, test whether the exam scores are indeed linearly dependent on IQ. Ho: (in symbols)___; (in words) ____________________________________Ha: (in symbols)___; (in words) ____________________________________Test Procedure: _______________________________________p-value: ____________________Decision: ______________________Conclusion: At alpha = 0.05, ______________________________________. Doornik-Hansen Test (Exam Scores vs IQ)DH: 3.808173 p-value:0.4325889Correlation Coefficients between Exam Scores and IQSpearman'sKendall's T =0.6021854Ha: not equal to 0p-value = 0.0002619Pearson's r= 0.7403599= 0.7680134Ha: not equal to 0Ha: not equal to 0p-value0.0001894p-value = 0.0000768Expected Frequencies of Strategy vs Exam Resultstrategy FP128228RcmdrMsg: [22] WARNING:RcmdrMsg 2 expected frequencies are less than 5Test of Independence between Strategy and Exam ResultChi-Square p-Fisher's Exact Testvalue = 0.2636p-value = 0.582Regression of Exam Scores on IQCoefficients:(Intercept)Estimate Std. Error t value Pr(>|t|)-23.98310.795520.5950 -1.165 0.2594190.1703 4.673 0.000189 ***iqSignif. codes: **** 0.001 **** 0.01 0.05 0.1Residual standard error: 8.92 on 18 degrees of freedomMultiple R-squared: 0.5481, Adjusted R-squared: 0.523F-statistic: 21.83 on 1 and 18 DF, p-value: 0.0001894 student strategy iq11111111234567891011121314151617181920111N22T122222NNNN222115103110131132138115136118104126141130122123110112129108105scoreresult78 P65 P50 F78 P82 P95 P80 P84 P66 P75 P80 P90 P80 P55 F64 P58 F65 P79 P62 P50 F

Correlation is used to measure the strength of association between the two numerical variable. It…

Answered: Aleyla, an educator, would like to…

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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Aleyla, an educator, would like to investigate whether students’ IQ have an effect on their exam scores. She also wants to determine if teaching strategy is associated with whether students pass or fail in the exam (exam result). She then randomly selected twenty students and conducted an IQ test. Further, she randomly assigned them to the two teaching strategies. The students’ exam scores were recorded.

1. Test at 5% level of significance if teaching strategy is associated with exam.

Test Procedure: ______________
p-value: _______________

Decision: _____________________

Conclusion: At alpha = 0.05,
______________________________________________________________

2. At 5% level of significance, test whether the exam scores are indeed linearly dependent on IQ.

Ho: (in symbols)___; (in words) ____________________________________
Ha: (in symbols)___; (in words) ____________________________________

Test Procedure: _______________________________________

p-value: ____________________

Decision: ______________________

Conclusion: At alpha = 0.05, ______________________________________.