STA404 Official Handouts

Hypothesis · Testing · Pr · oc · ed · ur · e · General · Sorting flypsthssis-Tsding bablams god’ñianaI Mdhad)

4tep I Biep 3

6ieg S State the hypotheses and identify the claim. Find the critical valne{s) fmm the appropriate uble TU Compute the ten value. Oep A Make the decision to reject or not reject the null hypothesis. Summarize the results.

General · formula · format

Many hypotheses are tested using a statistical test based on the following general formula:

Test Value — (Observed value) — (Expected value) Standard error

The observed value is the “statistic” (such as the mean) that is computed from the sample data.

The expected value is the “parameter” (such as the mean) that you would expect to obtain if the null hypothesis were true. In other words, the hypothesized value.

The denominator is the standard error of the statistic being tested (in this case, the standard error of the mean). b — S. E(b)

It is t-test. It depends on Degree of Freedom -— df= n-2