Statistics › Section I · Hypothesis testing with one sample › Topic I.3
Picking the distribution for a test
Once the hypotheses are written, a test needs the right curve to judge the data against: normal or t for a mean, normal for a proportion. What is known about the population decides which.
In this topic
- The test's measuring stick
- The test statistic: distance in standard errors
- Known sigma: the standard normal
- Unknown sigma: the t distribution
- Proportions: normal with the null's p
- The recipe, one line
- Conditions travel with the curve
- Worked example: the cereal statistic
- Worked example: the poll's statistic
- Common mistakes to avoid
- Key takeaways
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