Microsoft Office Home Mail -rashanahbilal@ideTake Test: Chapter Test / https://e
ID: 3051656 • Letter: M
Question
Microsoft Office Home Mail -rashanahbilal@ideTake Test: Chapter Test / https://eaglebb.coppin.edu/webapps/assessment/takelaunchjsp?course-assessment id=-408 32,1&course; id-24891 1&content;_id= 1125597 1&step-null; Question Completion Status QUESTION 4 Does it pay to study for an exam? The number of hours studied, x. is compared to the exam grade received y 5 4 2 80 80 70 90 60 Based on the what you got from previous problem on the what you got from previous problems, estimate the grades f a student study 4 5 hours for the exam. Keep the answer to the nearest hundreath.Explanation / Answer
Sol:
obtain a regression eq y interms of x as:
noofhours <- c(2,5,1,4,2)
gradereceived <- c(80,80,70,90,60)
reg.mod1 <- lm(gradereceived~noofhours)
coefficients(reg.mod1)
output:
(Intercept) noofhours
64.074074 4.259259
Intrepretation
gradereceicved=64.074074+4.259259*noofhours
for noofhours =4.5
gradereceicved=
64.074074+4.259259*(4.5)
83.24074
=83.24(ROUNDING TO NEAREST HUNDREDTH)
ANSWER:83.24