Chi Square Test: Nielsen/NetRating is a global leader in Internet media and market research. In May 2010, the firm repor

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Chi Square Test: Nielsen/NetRating is a global leader in
Internet media and market research. In May 2010, the firm reported
on the “search” shares (i.e. proportion of all internet searches)
for the most popular search engines available on the Web
0.55
0.22
0.11
0.12
147
N=1000
A. Set up a null and alternative hypothesis to test if the
preferences (pi) for the four search engines are the same as
before
B. Calculate the expected preferences E(ni) and put your answers
in the table above.
C. Use the formula to calculate
the c2 test
statistic.
(show the calculated values for each group and the final
value)
c2 =
D. The critical chi-square (c2)
value for a =0.01
D. What conclusion can we derive from the chi-square test? At
the 1% level are the “search” shares the same as those reported by
Nielsen/NetRatings?