The manager of the customer service division of a major consumer electronics company
is interested in determining whether the customers who have purchased a videocassette
recorder made by the company over the past 12 months are satisfied with their products.
The possible responses to the question "Are you happy, indifferent, or unhappy with the
performance per dollar spent on the videocassette recorder?" are values from a
a. discrete numerical random variable.

b. continuous numerical random variable
c. categorical random variable.

d. parameter.

C. Categorical Random Variable

Explanation:

Discrete Random Variable has countable number of distinct values . Eg : 1 , 2 , 3 ...

Continuous Random Variable has uncountable (infinite) number of distinct values. Eg : 1 , 1.5 , 1.54

Categorical Random Variable is variable that can take limited , fixed responses or values.

Given Case: Customer Service division of Electronic Company : taking consumer responses as - Happy, Indifferent or Unhappy - has limited , fixed responses to the satisfaction level. So, it is a 'Categorical Random Variable'.  

answer; ///i believe that the correct answer is (d) ///all of the