Understanding Basic Statistics 6th Edition by Charles Henry Brase,Corrinne Pellillo Brase

Exercise 15

Critical Thinking Numbers are often assigned to data that are categorical in nature.
(a) Consider these number assignments for category items describing electronic ways of expressing personal opinions:
1 = Twitter; 2 = e-mail; 3 = text message; 4 = Facebook; 5 = blog
Are these numerical assignments at the ordinal data level or higher
(b) Consider these numbers assignments for category items describing usefulness of customer service:
1 = not helpful; 2 = somewhat helpful; 3 = very helpful; 4 = extremely helpful
Are these numerical assignments at the ordinal data level Explain. What about at the interval level or higher Explain.