A jeweler advertises that "diamonds are a girl's best friend." A random sample of 160 women is drawn and each woman is asked whether she would choose diamonds, pearls, rubies, or emeralds (all of equal value). Which one of the following is true?
a. Chi-square Test for Independence should be used.
b. Chi-square Test for Goodness of Fit should be used.
c. There are 159 degrees of freedom.
d. There are 3 degrees of freedom.
e. Both b) and d) are true.
Ans: e
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