The table below shows the number of absences, x, in a Statistics course and the final...
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The table below shows the number of absences, x, in a Statistics course and the final exam grade, y, for 8 students. 4 3 3 7 95 90 90 55 70 80 85 54 Necessary calculations: You may need to find the following quantities to answer the following questions: E-, xi =?, E-1 xỉ =?, E-1 yi =?, E-1 y =?, and E-1xiyi =?. (i) Draw a scatter diagram for the variables x and y and hence indicate what type of relationship exist between them. (ii) Find the sample correlation coefficient and interpret your result. The table below shows the number of absences, x, in a Statistics course and the final exam grade, y, for 8 students. 4 3 3 7 95 90 90 55 70 80 85 54 Necessary calculations: You may need to find the following quantities to answer the following questions: E-, xi =?, E-1 xỉ =?, E-1 yi =?, E-1 y =?, and E-1xiyi =?. (i) Draw a scatter diagram for the variables x and y and hence indicate what type of relationship exist between them. (ii) Find the sample correlation coefficient and interpret your result.
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Answer rating: 100% (QA)
x i y i x i 2 y i 2 x i yi 1 95 1 9025 95 0 90 0 8100 0 2 90 4 8100 ... View the full answer
Related Book For
Elementary Statistics A step by step approach
ISBN: 978-0073386102
8th edition
Authors: Allan Bluman
Posted Date:
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