Need help with just question C. Have provided my answers for A & B for more information to help with C.

A team of researchers are interested in seeing if students who check their phones more often get worse grades in the class. To measure the "phones" variable, the researchers placed unobtrusive video recording devices in the large lecture classrooms around campus. Later, coders view tapes of the classrooms and record how often students in each classroom checked their phones during class. To measure the "grades" variable, they used student exam scores in the class.

A. What's the scale of measurement of the "checking phones" variable?

If the researchers accurately record the precise number of times students check their phones, the scale of measurement for the "checking phones" variable is likely to be on a ratio scale of measurement.

B. What kind(s) of reliability would need to be evaluated for the phone measure?

Test-retest or inter-rater

C. Describe a result that would indicate that the phone measure has good reliability of the type you listed in (b).