According to a marketing expert, 40% of Pastafarians prefer lasagna. If 9 out of 20 pastafarians choose lasagna over other pastas, what can be concluded about the expert's claim? Use a 0.05 level of significance.
Attempt:
H0: p=0.4
H1: p=/=0.4
Test statistic: Binominal variable X with p=0.4 and n=20.
x=9, and np0 = 8
\(
P=1 - \Sigma_{x=0}^9 b(x;20,0.4) = 1 - 0.7553 = 0.2447
\)
Correct answer: 0.4044.
Attempt:
H0: p=0.4
H1: p=/=0.4
Test statistic: Binominal variable X with p=0.4 and n=20.
x=9, and np0 = 8
\(
P=1 - \Sigma_{x=0}^9 b(x;20,0.4) = 1 - 0.7553 = 0.2447
\)
Correct answer: 0.4044.
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