Email At CPU every student gets a college email address. Data ...

[Yolanda]

Email At CPU every student gets a college email address. Data collected by the college showed a negative association between student grades and the number of emails the student sent during the semester.
 
  a. Briefly explain what negative association means in this context.
 
  b. After seeing this study the college proposes trying to improve academic performance by limiting the amount of email students can send through the college address. As a statistician, what do you think of this plan? Explain briefly.

Question 2

Associations For each pair of variables, indicate what association you expect: positive(+), negative(-), curved(C), or none(N).
 
  a. the number of miles a student lives from school; the student's GPA
  b. a person's blood alcohol level; time it takes the person to solve a maze
  c. weekly sales of hot chocolate at a Montana diner; the number of auto accidents that week in that town
  d. the price charged for fund-raising candy bars; number of candy bars sold
  e. the amount of rainfall during growing season; the crop yield (bushels per acre)

[Leostella20]

Answer to Question 1

a. Negative association implies that students who sent out more emails during the semester tended to have lower grades.
b. This plan assumes that association means cause and effect. The college incorrectly proposes to limit emails through the
h. Residual equals the observed tread depth minus the predicted tread depth. A negative residual means that the observed amount of tread depth is less than the predicted amount of tread depth, using this model. This means that the tire tread is actually wearing out faster than the model predicts.

Answer to Question 2

Anone; Bpositive(+); Cpositive(+); Dnegative(-); Ecurved

[Yolanda]

Thanks

[Leostella20]

Welcome