If the outcomes of a discrete random variable follow a Poisson distribution, then their:

If the outcomes of a discrete random variable follow a Poisson distribution, then their:
 
  A) mean equals the standard deviation.
  B) mean equals the variance.
  C) median equals the variance.
  D) median equals the standard deviation.

Q. 2

A question in a survey asks for a respondent's favorite sport. Which measure of central tendency should be used to summarize this question?
 
  A) arithmetic mean
  B) geometric mean
  C) median
  D) mode

Q. 3

The probability that a person wants a vehicle navigation system but not better fuel efficiency is:
 
  A) 0.90
  B) 0.10
  C) 0.45
  D) 0.35

Q. 4

Ordinal data indicate the rank ordering of items, and similar to nominal data, the values are words that describe responses.
 
  Indicate whether the statement is true or false

Q. 5

If a distribution is highly skewed, what measure of central tendency should be avoided?
 
  A) arithmetic mean
  B) median
  C) mode
  D) all of the above

Q. 6

What is the expected number of pieces of junk mail you receive daily?
 
  A) 6.76
  B) 1.61
  C) 3.22
  D) 2.60