![]() ![]() Pse mail processing clerk vs mail handler.For example, a relatively reasonable model for the average daily temperature in Peoria, Illinois, is T ( x) = 50 - 42 cos (0.017 x - 0.534), where x is the day of the year starting with January 1 as Day 1. You can use the graph for a trigonometry function to show average daily temperatures at a specific location. The correlation coefficient r is a quantitative measure of association: it tells us whether the scatterplot tilts up or down, and how tightly the data cluster around a straight line. Correlation and Association The point of averages and the two numbers SD X and SD Y give us some information about a scatterplot, but they do not tell us the extent of the association between the variables. ![]() For which places would the sine function be a more obvious model for the temperature data? Rewrite the equation using the sine function. Write a trigonometric equation using the cosine function that best models this situation. Above is a table of average monthly temperatures at Wellington Airport from 1971-2000. ![]()
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