APST 207 Lecture Notes - Lecture 10: Michigander, Confidence Interval, Statistical Hypothesis Testing
Document Summary
The t-distribution changes based on degrees of freedom. That means that our tcritical value changes depending on df. Calculated using the t. inv. 2t function in excel. You calculate the t-score for our hypothesis test by hand: Use t. dist. 2t to determine the probability associated with our t-score for two tailed tests. Always interested in the relationship between p-value and . It tells us what % of the t-distribution is left in the tails. It tells us our confidence level (since = 1- confidence interval) It tells us our risk of committing type i error. Rejecting the null hypothesis when the null hypothesis is true. In 2007 a thermometer question show that the average michigander responded with a score of. Going to do null hypothesis test: state the null hypothesis (h0, state the alternative hypothesis (ha, choose your test statistic (and justify it, choose your rejection region, calculate the test statistic, state the conclusion.
