For the data file, go to R and type in >install.packages(\"alr4\") 1.6 Professor

Question

For the data file, go to R and type in >install.packages("alr4")

1.6 Professor ratings (Data file: Rateprof) In the website and online forum RateMyProfessors.com, students rate and comment on their instruc- tors. Launched in 1999, the site includes millions of ratings on thousands of instructors. The data file includes the summaries of the ratings of 364 instructors at a large campus in the Midwest (Bleske-Rechek and Fritsch, 2011). Each instructor included in the data had at least 10 ratings over a several year period. Students provided ratings of 1-5 on quality,

Explanation / Answer

We have 5 variables quality, clarity, helpfulness, easiness, and raterInterest. From the matrix of scaterplot, we can see that all the five variables are positively correlated. The correlation between quality, clarity, and helpfullness appears very strong and higher than with the other two variables. Among the later two variables, the raterInterest seems weakly associated with the first three variables. Also, since the association between the first three variables is very strong, we can as well drop one of the variables.

Related Questions

Navigate

• Browse (All)
• Browse F
• Subjects

---