Given are five observations for two variables, x and y. x 1|2 3 Yi 46 6 10 14 (a) Develop a scatter diagram for these data. y 18 y 18 y 18 y 18 15 15 15 15- 12 12 12 12 9. 9 9 9 6. 6+ 6 6+ . 3 3 3- 3- 1 2 3 5 6" 1 2 3 4 5 1 5 6 1 3 4 5 2 3 4 6 (b) What does the scatter diagram developed in part (a) indicate about the relationship between the two variables? O There appears to be no noticeable relationship between x and y. O There appears to be a negative linear relationship between x and y. O There appears to be a positive linear relationship between x and y. (c) Try to approximate the relationship between x and y by drawing a straight line through the data. y y y y 18 18 18 18 15 15- 15 15 12 12 12 12 9- 9 9- 9+ 6. + 6 6- 6+ 3- 3 3- 3- 1 2 3 4 1 2 3 4. 6 1 2 3 4 4 6.

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.