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Null and alternative hypotrhesis are
Ho:The distribution of colors is the same as stated by the manufacturer.
H1: The distribution of colors is not the same as stated by the manufacturer.
Category | Pi | Oi=frequency | Ei=Expected | R2i=(Oi-Ei)2/Ei |
Brown | 0.13 | 62 | 50.96 | 2.391711146 |
Yellow | 0.14 | 67 | 54.88 | 2.67664723 |
Red | 0.13 | 54 | 50.96 | 0.181350078 |
Blue | 0.24 | 61 | 94.08 | 11.63144558 |
Orange | 0.2 | 85 | 78.4 | 0.555612245 |
Green | 0.16 | 63 | 62.72 | 0.00125 |
total | 1 | 392 | 392 | 17.43801628 |
#test stattistics
#
#=17.4381
P-value=P(>17.438)=0.00374
from excel: chidist(17.438,5)
#P-value=0.004
P-value<0.05 hence we reject Ho
Conclusion:
Option c is correct
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