Stats: Hypothesis Testing (P-value Method)

Demonstrates the basics of hypothesis testing using the P-value method: find the test statistic which in turn gives us the P-value, then compare the P-value to the level of significance (alpha) to determine whether or not the Null Hypothesis is rejected or not.

Remember, first find the test statistic. Then, using its value, find the AREA in the tail(s). This area is called the "p-value". To find area, watch this video:    • Stats: Finding Probability Using a No...  

PLEASE NOTE! I did not make a mistake by showing .0045 as the area (probability) for 2.61. Look carefully at my picture. I have shaded to the *RIGHT* of 2.61, not to the left. If you look up 2.61 on your table and see .9955 your table is assuming you want the area shaded to the LEFT of 2.61. Again, I shaded to the RIGHT of 2.61. I hope that makes sense.