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10 cards from this deck
It assumes no effect or difference exists in the population.
It indicates there is an effect or difference to be tested.
It's the probability of wrongly rejecting H0H_0H0 when true.
A standardised value derived from sample data for testing.
The probability of observing a result at least as extreme.
The threshold a test statistic must exceed to reject H0H_0H0.
z=(xˉ−μ0)/(σ/n)z = (\bar{x} - \mu_0) / (\sigma / \sqrt{n})z=(xˉ−μ0)/(σ/n) from sample data.
z=sample mean−hypothesised meanstd dev/nz = \frac{\text{sample mean} - \text{hypothesised mean}}{\text{std dev}/\sqrt{n}}z=std dev/nsample mean−hypothesised mean.
For one-tailed tests, it's approximately −1.645-1.645−1.645 or 1.6451.6451.645.
There is significant evidence against H0H_0H0 in the study.
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