USTAT217Q3F09W-solution

# USTAT217Q3F09W-solution - amount of litter already on the...

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Statistics 217 – B23/B24                    Quiz Three Solution      March 13,  2009 1. None Small Amount Large Amount Littering 17 31.33 28 31.33 49 31.33 Not littering 73 58.67 62 58.67 41 58.67 Ho: People’s tendency to litter is independent of the amount of litter already on  the ground  Ha: People’s tendency to litter is not independent of the amount of litter already  on the ground  Test statistic:  χ 2  = (O-E) Σ 2 /E =  6.557 + 0.355 + 9.961 +3.502 + 0.189 + 5.320 = +6.400 + 1.667 + 1.800= 25.884 Critical value:  χ 2 0.02, 2  = 7.82405 Rejection region  χ  > 7.82405 Reject Ho. The data indicated that people’s tendency to litter depends on the

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Unformatted text preview: amount of litter already on the ground. 2. Ho: p 1 = 1/4; p 2 = 1/4; p 3 = ¼, p 4 = 1/4 (no difference) Ha: At lest one proportion differs from its hypothesized value. (difference) The expected frequencies are 50/4 = 12.50 Test statistic: χ 2 = (O-E) Σ 2 /E = 2.42+1.62+2.42+1.62 = 8.08 χ 2 0.03, 3 = 8.94729 Rejection region χ 2 > 8.94729 Do not reject Ho. The data does not provide sufficient evidence to indicate that whether the true proportions of the preferences to the four possible orientations differ....
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## This note was uploaded on 09/10/2009 for the course STAT 217 taught by Professor Dan during the Winter '07 term at University of Calgary.

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USTAT217Q3F09W-solution - amount of litter already on the...

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