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Question 1:

Illl'hat is meant by the statement that two va riabla are related? Choose the correct answer. (.1 Two variables are related when the value of one can be derived mathematiizalh.r From the value of the other. L'J Two variables are related when a statterplot Eln be made of points using the two variables as values. (.1 Two variables are related when a change in one can be shown to Eluse a change in the other. L'J Two variables are related when a discernible pattern exists between them. Forest Fies and Acres Burned Numbers [in thousands} of JForest fires over the year and the number [in hundred thousands) of acres burned JFor 6 recent years are shown. Number of fir x 62 1'1 159' SE 4? E4 Number of acres burned j' 51 13 I52 42 215 15 f'\\ Landau 11:3er The correlation coeFFicient For the data is T = _2]'9 and II = 0.01. Should regression analysis be done? DThe regression analysis should not he done. 0 The regression analysis should be done. Find the equation of the regression line. Water and Carbohydrates There are many interesting relationships among the various nutrients found in fruits and vegetables. Listed below are the number of grams of water and the number of grams of carbohydrates for a random selection of raw foods ( 100 g each). Water 79.35 76.36 75.62 84.63 82.15 73.80 76.29 Carbs 1503 1932 23.41 11.21 21.49 23.58 22.12 Send data to Excel The correlation coefficient for the data is /= -0.760 and a= 0.05. Should regression analysis be done? The regression analysis should not be done. O The regression analysis should be done. Find the equation of the regression line. Round the coefficients to at least three decimal places. y'= atbx Q = b = Find )"when * = 70. Round your answer to at least three decimal places.Life Expectancyes A random sample of nonindustrialized countries was selected, and the life expectancy in years is listed for both men and women. Men 53.8 68.6 47.8 54.2 66.9 57.7 Women 47.4 72.7 48.3 44.6 77.0 58.1 Send data to Excel The correlation coefficient for the data is 7 = 0.924 and a = 0.03. Should regression analysis be done? O) The regression analysis should not be done. O The regression analysis should be done. Find the equation of the regression line. Round the coefficients to at least three decimal places. 7 =atbx Q = b = Find women's life expectancy in a country where men's life expectancy = 64 years. Round your answer to at least three decimal places. Women's life expectancy is years.Complete the statements, A positive relationship between two variables means that as X increases, Y (Choose one) A negative relationship between two variables means that as X increases, y (Choose one) increases decreases decreases increases\fOil and Gas Prices The average gasoline price per gallon (in cities) and the cost of a barrel of oil are shown for a random selection of weeks from 2009-2010. Is there a linear relationship between the variables? oil ($) 44.01 43.29 82 22 68.62 60.75 65.42 Gasoline ()) | 2.199 2.321 3.043 3.033 2.379 3.088 Send data to Excel Part: 0 / 5 Part 1 of 5 (a) Draw the scatter plot for the variables. Oil and Gas Prices X 25- Gas Prices 1.5- 10 20 30 Oil Prices