Use the given summary statistics to do the calculations in examples 9-12. n = 10

Question

Use the given summary statistics to do the calculations in examples 9-12. n = 10·Ex-1 11. e= 1371 , Ey = 76. Ty? = 754Exy = 702, b,-18.91 57, bl " " 1.01 94, xo 5 If you are unable to evaluate this expression as a whole, break it up into pieces using order of operations. Work to 5 decimal place in (a - d) and round final answer in (e) to 4 decimal place (a) Numerator = n(2xy)-(Ex)(2y) = 10 . 702-111-76- (b) A= [n(Ex2)-(Ex)' ] = 10-1371-111-2-he (c) B = [n(Zy2)-(Zy)' ] " 10 . 754-76-2 = (d) Denominator 2nd x? A B) ENTER (e) Calculate r= Numerator ÷Denominator= Example 9: Calculate the Standard Error, se=-ON-2 Write final answer to 1 decimal place. Ex Example 10: Calculate the sample mean to one decimal place 1n(x-x) Example 1: Evalua1 to one decimal place Example 12: The weights for homework, tests and final exam are 0.10, 0.5 and 0.40 respecively. A student receives overall homework score of 90, test scores of 85, 70, 90, 75 and final exam score of 70. Complete questions a - d below 85.10.90 +15 ,2014-10 (a)Calculate the average Exam score = (b) weighted Mean-0.10( .q0)+0$(f-)+04010 0.10+0.5+0.40

Explanation / Answer

Use the given summary statistics to do the calculations in examples 9-12. n = 10·Ex-1 11. e= 1371 , Ey = 76. Ty? = 754Exy = 702, b,-18.91 57, bl " " 1.01 94, xo 5 If you are unable to evaluate this expression as a whole, break it up into pieces using order of operations. Work to 5 decimal place in (a - d) and round final answer in (e) to 4 decimal place (a) Numerator = n(2xy)-(Ex)(2y) = 10 . 702-111-76- (b) A= [n(Ex2)-(Ex)' ] = 10-1371-111-2-he (c) B = [n(Zy2)-(Zy)' ] " 10 . 754-76-2 = (d) Denominator 2nd x? A B) ENTER (e) Calculate r= Numerator ÷Denominator= Example 9: Calculate the Standard Error, se=-ON-2 Write final answer to 1 decimal place. Ex Example 10: Calculate the sample mean to one decimal place 1n(x-x) Example 1: Evalua1 to one decimal place Example 12: The weights for homework, tests and final exam are 0.10, 0.5 and 0.40 respecively. A student receives overall homework score of 90, test scores of 85, 70, 90, 75 and final exam score of 70. Complete questions a - d below 85.10.90 +15 ,2014-10 (a)Calculate the average Exam score = (b) weighted Mean-0.10( .q0)+0$(f-)+04010 0.10+0.5+0.40

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