Use the table to find the following, unit price being your (x) and units sold (y). a. Find linear correlation coefficient. Years of Experience Salary in 1000$ 15 28 42 13 64 8 50 16 90 11 58 8. I 1 54 b. Find the line of best fit. c. How many units will sell if the unit price was 0.85.

y 6 4 2 0 0 2 4 6 8 x Tell whether the data have a positive correlation, a negative correlation, or approximately no correlation.

Let x be the average number of employees in a group health insurance plan, and let y be the average administrative cost as a percentage of claims.

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Need help with part d only? The slope and average is?

Which correlation represents the weakest linear relationship between x and y? Select one: a. 0.50 b. 0.75 c. -0.89 d. -0.05

Would it be OK to use the line to predict the age of the wife if the husband is 80 years old? Explain your answer.

Use the table to find the following, unit price being your (x) and units sold (y). a. Find linear correlation coefficient. Years of Experience Salary in 1000$ 2 3. 15 28 42 13 64 50 16 90 11 58 8 54 b. Find the line of best fit. c. How many units will sell if the unit price was 0.85.

Assume the correlation coefficient between advertising dollars spent and sales is .78. How much of the variability in sales is explained by the relationship between sales and advertising dollars? a. 39.16% b. 60.84% c. 78% d. 22%

Let x be the average number of employees in a group health insurance plan, and let y be the average administrative cost as a percentage of claims. x 3 7 15 32 75 y 40 35 30 26 18 (a) Make a scatter diagram of the data and visualize the line you think best fits the data.  Flash Player version 10 or higher is required for this question. You can get Flash Player free from Adobe's website.   (b) Would you say the correlation is low, moderate, or strong? positive or negative? strong and negative moderate and negative   strong and positive low and negative low and positive moderate and positive (c) Use a calculator to verify that Σx = 132, Σx2 = 6932, Σy = 149, Σy2 = 4725, and Σxy = 2997. Compute r. (Round your answer to three decimal places.)r =  As x increases, does the value of r imply that y should tend to increase or decrease? Explain. Given our value of r, we cannot draw any conclusions for the behavior of y as x increases. Given our value of r, y should tend to…