Which of the following is a categorical variable?

Which of the following is a categorical variable?
 
  A) tire pressure
  B) bank account balance
  C) daily sales in a store
  D) eye color

Q. 2

What is the relationship among the mean, median, and mode in a positively skewed distribution?
 
  A) They are all equal.
  B) The mean is always the smallest value.
  C) The mean is always the largest value.
  D) The mode is the largest value.

Q. 3

In rating the service provided by a restaurant server, the following responses are possible: excellent, above average, average, below average, and poor. The responses are coded from 1 to 5 with 5 being excellent.
 
  The level of measurement this scale represents is:A) nominal.
  B) ordinal.
  C) interval.
  D) ratio.

Q. 4

Suppose you are told that the average return on investment for a particular class of investments was 7.8 with a standard deviation of 2.3. Furthermore, the histogram of the distribution of returns is approximately bell-shaped.
 
  We would expect that 95 percent of all of these investments had a return between what two values?A) 5.5 and 10.1
  B) 0 and 15
  C) 3.2 and 12.4
  D) 0.9 and 14.7

Q. 5

You asked ten of your classmates about their weight. On the basis of this information, you stated that the average weight of all students in your university or college is 142.6 pounds. This is an example of:
 
  A) descriptive statistics.
  B) inferential statistics.
  C) parameter.
  D) population.

Q. 6

Suppose you are told that over the past four years, sales have increased at rates of 10, 8, 6, and 4. What has been the average annual increase in sales over the past four years?
 
  A) 7.0
  B) 6.7
  C) 6.4
  D) 6.5