Statistics Solutions

[Solution] The following contingency table provides the breakdown of 3 types of cell phones and 3 plans: PRICE CATEGORIES TYPE Plan X Plan Y Plan Z TOTAL

Question: The following contingency table provides the breakdown of 3 types of cell phones and 3 plans:

PRICE CATEGORIES

TYPE Plan X Plan Y Plan Z TOTAL

A 34 12 44 90
B 23 64 33 120
C 16 58 76 150
TOTAL 73 134 153 360

If a cell phone is selected at random:

  1. What is the probability that it is ( Type B ) AND ( using plan Y ) ?
  2. What is the probability that is type A GIVEN that it is NOT using plan X?
  3. What is the probability that it is type A OR using plan Z?

d) If 2 cell are chosen at random without replacement, what is the probability that both are using plan Y?

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Solution: The downloadable solution consists of 2 pages
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