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A claim says the population mean has decreased from μ0\mu_0μ0. What is H1H_1H1?
A
It shows insufficient evidence against H0H_0H0, not proof that H0H_0H0 is true.
B
X‾∼<strong>N(250,94)</strong>\overline X\sim <strong>N\left(250,\frac94\right)</strong>X∼<strong>N(250,49)</strong>.
C
For a two-tailed test with observed z>0z>0z>0, the p-value is 2P(Z≥z)\boxed{2P(Z\ge z)}2P(Z≥z).
D
H1:μ<μ0H_1:\mu<\mu_0H1:μ<μ0 - a lower-tailed test.
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4.3.2 Statistical hypothesis testing (A-level only) Flashcards
23 flashcards on WJEC A Level Maths 4.3.2 Statistical hypothesis testing (A-level only): the key formulae, methods and definitions you need to recall for AS Unit 1, AS Unit 2, A2 Unit 3 and A2 Unit 4.