Question

eorgia State U (D Chapter, 6-ELEMENTARY STAm × 1 e ElementaryStatistics Yao MWF· ×1 e E DA Examining Relationships + -) с http://olicmu.eu assessment2/activity/attempt view.do?rev eBcntext-3db18a190a0001 cours Consider the following scatterplot, regression equation, and correlation of Pointso out of s midterm and final exam scores for a class of 15 students. Which of the following are true statements? 90.6-0.489x , r =-0.602 110 10이 80 70 6어 5어 40 30 20 (D 20 40 60 80 100 Mdterm Exam Score as scored 100 on the final exam. 1. The same number of students sored 1oo on the midterm exan s scored 1ooon the final enam I. Students who scored higher on the midterm exam tended to score higher on the final exam. III. The correlation between midterm and final exam scores is negative. IV、The standard deviation of the final exam scores is greater than the standard deviation of midterm exam scores A. I and III O Type here to search

Need answer of this question with explanation!

Answer 1

here as there are 2 students who scored 100 in both the exams ; hence I is correct

as we can see that trend is negative hence II is in correct

correlation(-0.602) is negative ; therefore III is correct

Sy/Sx =r*b1=(-0.602)*(-0.489)=0.294 ; therefore Sy<Sx hence IV is in correct

hence correct options are I and III

option A is correct