Professor Nord stated that the mean score on the final exam from all the years he has been teaching is a 79%. Colby was in his most recent class, and his class's mean score on the final exam was 77%. Colby decided to run a hypothesis test to determine if the mean score of his class was different than the mean score of the population. a = .05. What is the mean score of the population? What is the mean score of the sample? Is this test one-tailed or two-tailed? Why? What are the null and alternative hypotheses in this case? Let's pretend that p was calculated, and p = 0.09, should Colby reject or fail to reject the null hypothesis? Why? What should Colby's statement of conclusion be? (This circles back to what is being tested)

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Ratios

A ratio is a comparison between two numbers of the same kind. It represents how many times one number contains another. It also represents how small or large one number is compared to the other.

Trigonometric Ratios

Trigonometric ratios give values of trigonometric functions. It always deals with triangles that have one angle measuring 90 degrees. These triangles are right-angled. We take the ratio of sides of these triangles.