A politician takes an SRS of 75 citizens in a county to see what proportion of citizens sampled are satisfied with their standard of living. Suppose that 80% of the 118,000 citizens in the county are satisfied with their standard of living. What are the mean and standard deviation of the sampling distribution of the proportion of citizens who are satisfied with their standard of living?

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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.