positive linear correlation pegative linear correlation

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Measles and Mumps A researcher wishes to see if there is a relationship between the number of reported cases of measles and mumps for a recent 5 - year period . Is there a linear relationship between the two variables ? Measles cases (x)  49 130 61 54 220 Mumps cases (y) 817 454 2002 2552 388

Question Help ▼ For the data shown to the right, determine the linear correlation coefficient using two different formulas shown below, Complete parts (a) and (b) below and compare your answers 22 34 4 502 1 y a. Use the definition r= Find the sum required to calculate r using the definition. E(x -x) (y, -y) - Type an integer or a decimal. Do not round )

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Average Age and Length of Service The data show the average ages and lengths of service in months. Age 24.8 25.4 26.3 26.7 27.1 Time 66.3 71 72.5 88.2 80.2 Send data to Excel The correlation coefficient for the data is r = 0.824 and a= 0.05. should regression analysis be done? The regression analysis should not be done. • The regression analysis should be done. Find the equation of the regression line. Round the coefficients to at least three decimal places. y'= a+bx a = -120.306 b = 7.519 If a service person is 26.7 years old, predict the time that the person will serve. Round the answer to at least one decimal place. The service person will serve 80.45 months.

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Pearson correlation is an example of a nonlinear correlation Pearson correlation is an example of a nonlinear correlation true or false

The value of the correlation that represents the weakest linear correlation. -0.24 0.50 0.35 0.00