- 1.
- Hypotheses: versus
- 2.
- Test Statistic:
- 3.
- P-value: Presuming
*H*_{0}is true, the likelihood of chance variation yielding a*t*-statistic higher than 1.55 (this is the*H*_{1}direction) is .09. - 4.
- Conclusion: Since P-value > .05, we do not reject
*H*_{0}. The sample does not provide enough evidence to disprove the store's claim.

Summary of the **upper-tailed** *t*-test for :

- versus
- Test statistic:
- P-value: Total area
*greater than**t*(the direction of*H*_{1}) under*t*-curve with*n*-1 degrees of freedom. If*t*is far enough*above*0 (the direction of*H*_{1}), the P-value will be small. - Conclusion:
If P-value
.05, we reject
*H*_{0}with statistical significance. If P-value .01, we reject*H*_{0}with high statistical significance. If P-value>.05, we do not reject*H*_{0}.