If the absolute value of your calculated t-statistic exceeds the critical value from the standard normal distribution, you can

If the absolute value of your calculated t-statistic exceeds the critical value from the standard normal distribution, you can reject the null hypothesis . Set the significance level, α, the probability of making a Type I error to be small  0.01, 0.05, or 0.10. Compare the P-value to α. If the P-value is less than (or equal to) α, reject the null hypothesis in favor of the alternative hypothesis. If the P-value is greater than α, do not reject the null hypothesis.

hello! michael completed the proof incorrectly.

you can see this between steps 2 and 3. step 2 proves akg and akl equal, while step 3 proves bkl and elk equivalent. these do not have anything to do with each other, therefore meaning the proof was incorrect.

side note: the measure of akg and akl are not equivalent; they are supplementary angles.

hope this !