Consider the following bivariate data.
Point | A | B | C | D | E | F | G | H | I | J |
x | 1 | 4 | 6 | 6 | 4 | 3 | 7 | 4 | 5 | 0 |
y | 7 | 6 | 3 | 4 | 0 | 6 | 2 | 0 | 6 | 3 |
(a) Construct a scatter diagram of the given bivariate data. (Do
this on paper. Your instructor may ask you to turn in this
work.)
(b) Calculate the covariance. (Give your answer correct to two
decimal places.)
(c) Calculate sx and sy.
(Give your answers correct to three decimal places.)
sx | = |
sy | = |
(d) Calculate r using formula 13.2. (Give your answer
correct to two decimal places.)
(e) Calculate r using formula 13.3. (Give your answer
correct to two decimal places.)
Consider the following bivariate data. Point A B C D E F G H I J x 0 6 5 6 0 0 2 5 1 0 y 5 3 1 5 3 6 4 6 5 0 (a) Construct a scatter diagram of the given bivariate data. (Do this on paper. Your instructor may ask you to turn in this work.) (b) Calculate the covariance. (Give your answer correct to two decimal places.) (c) Calculate sx and sy. (Give...
Consider the following bivariate data. Point A B C D E F G H I J x 4 3 0 4 7 1 6 5 7 2 y 4 6 7 0 7 7 3 3 7 1 (b) Calculate the covariance. (Give your answer correct to two decimal places.) A = -0.167 (c) Calculate sx and sy. (Give your answers correct to three decimal places.) sx = sy = (d) Calculate r using formula 13.2. (Give your answer correct...
Consider the following set of data. (15, 12), (34, 45), (62, 31), (78, 18), (106, 64), (122, 12) (a) Calculate the covariance of the set of data. (Give your answer correct to two decimal places.) (b) Calculate the standard deviation of the six x-values and the standard deviation of the six y-values. (Give your answers correct to three decimal places.) sx = sy = (c) Calculate r, the coefficient of linear correlation, for the data in part (a). (Give your...
Consider the following set of data. (15, 13), (32, 50), (64, 34), (79, 21), (108, 56), (120, 5) (a) Calculate the covariance of the set of data. (Give your answer correct to two decimal places.) (b) Calculate the standard deviation of the six x-values and the standard deviation of the six y-values. (Give your answers correct to three decimal places.) sx = sy = (c) Calculate r, the coefficient of linear correlation, for the data in part (a). (Give your...
Consider the following set of data. (19, 11), (26, 53), (65, 28), (77, 20), (108, 56), (118, 11) (a) Calculate the covariance of the set of data. (Give your answer correct to two decimal places.) A = -5.63 (b) Calculate the standard deviation of the six x-values and the standard deviation of the six y-values. (Give your answers correct to three decimal places.) sx = sy = (c) Calculate r, the coefficient of linear correlation, for the data in part...
Consider the following set of data. (19, 14), (29, 55), (55, 25), (83, 21), (106, 61), (125, 12) (a) Calculate the covariance of the set of data. (Give your answer correct to two decimal places.) (b) Calculate the standard deviation of the six x-values and the standard deviation of the six y-values. (Give your answers correct to three decimal places.) sx = sy = (c) Calculate r, the coefficient of linear correlation, for the data in part (a). (Give your...
Consider the following set of data. (21, 5), (33, 51), (59, 32), (83, 21), (113, 58), (119, 8) (a) Calculate the covariance of the set of data. (Give your answer correct to two decimal places.) (b) Calculate the standard deviation of the six x-values and the standard deviation of the six y-values. (Give your answers correct to three decimal places.) (c) Calculate r, the coefficient of linear correlation, for the data in part (a). (Give your answer correct to two...
Given that x = 3.5000, sx = 2.5884, y = 4.1000, sy = 1.9657, and r = -0.9552, determine the least-squares regression line. y = ____ x + (_____) A data set is given below. (a) Draw a scatter diagram. Comment on the type of relation that appears to exist be (b) Given that x = 3.5000, Sy = 2.5884, y = 4.1000, sy = 1.9657, and r = -0.9552, det (c) Graph the least squares regression line on the...
I need questions 1-3 & 6-10 answered with shown calculated work. 201 Bivariate Regression and Correlation 6 PROBLEMS General Problems 1. For the following data on 10 persons, construct a scatterplot showing the relationship between age and number of children. and describe the relationship in verbal terms Number o Children (Y) Age Person (i) 42 26 38 23 21 19 79 25 75 67 9 10 2. Using data from 60 adults, a community sociologist wants to estimate an equation...
Consider the following sample data: x 11 7 5 5 4 y 3 10 13 6 11 Click here for the Excel Data File a. Calculate the covariance between the variables. (Negative value should be indicated by a minus sign. Round your intermediate calculations to 4 decimal places and final answer to 2 decimal places.) Covariance b. Calculate the correlation coefficient. (Round your intermediate calculations to 4 decimal places and final answer to 2 decimal places.) Correlation coefficient