One of nature's patterns connects the percent of adult birds in a colony that return from the previous year and the number of new adults that join the colony. The data for 13 colonies of sparrowhawks are in the table. Percent return 74 70 86 56 77 60 51 44 63 44 62 49 33 New adults 6 6 8 11 14 14 17 16 19 18 18 19 21 Use the software of your choice to find the correlation between the percent of returning birds and the number of new birds. (Enter your answer rounded to three decimal places.) correlation:     The original data (green) and two new points are in the scatterplot. Point ? (blue) is 13% return, 26 new birds. Point ? (red) is 35% return, 11 new birds.   Find the new correlation for the original data plus Point ? . (Enter your answer rounded to three decimal places.) correlation (including Point ? ):     Find the new correlation for the original data plus Point ? . (Enter your answer rounded to three decimal places.) correlation (including Point ? ):     Adding Point A makes the correlation stronger. weaker. Adding Point B makes the correlation stronger. weaker.

A factory sorts out the number of beverage vending machines (x) and the number of beverage cans sold (y) on each floor, as shown in the table below, and try to find the correlation coefficient.

Each year forbes ranks the world’s most valuable brands. A portion of the data for 82 ofthe brands in the 2013 forbes list is shown in Table 2.12 (forbes website, february, 2014).The data set includes the following variables:brand: The name of the brand.Industry: The type of industry associated with the brand, labeled Automotive& Luxury, Consumer Packaged Goods, financial Services, Other, Technology.brand Value ($ billions): A measure of the brand’s value in billions of dollarsdeveloped by forbes based on a variety of financial information about the brand.1-Yr Value Change (%): The percentage change in the value of the brand over theprevious year.brand Revenue ($ billions): The total revenue in billions of dollars for the brand.a. Prepare a crosstabulation of the data on Industry (rows) and brand Value ($ billions).Use classes of 0–10, 10–20, 20–30, 30–40, 40–50, and 50–60 for brand Value($ billions).b. Prepare a frequency distribution for the data on Industry.

A scatterplot of two variables is a picture of the relationship represented in a correlation. Group of answer choices True False

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.

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Give an example of two variables that have a positive linear correlation. Give an example of two variables that have a negative linear correlation. Give an example of two variables that have no correlation. Below is the height in inches and weight in pounds of eleven individuals Height, x 62 63 66 68 70 72 73 74 74 75 75 Weight, y 195 190 250 220 250 255 260 275 280 295 300 x = 65 inches x = 69 inches x = 71 inches

The ages (in years) and heights (in inches) of all pitchers for a baseball team are listed. Find the coefficient of variation for each of the two data sets. Then compare the results.  heights      Ages 73              28 76              22 74              23 72             24 77             24 78             27 76            31 79            28 73            27 78           35 74           33 79           36

a teacher asked her students how many hours of sleep they had the night before a test.   what type of correlation does your graph show? Determine a equation line of best fit BY HAND using the points 7,90 nd 6,76. hours slept      :  8        7        7        8       6         5       7       4        9        7 score                 83      86      74      88     76       63     90     60     89        81

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