2g. [2 marks] Use the equation of the regression line on to estimate the circumference of a tree that is 40 m from the river bank. Markscheme (M1) (A1)(ft)(G2) Accept () for use of 3 sf. Accept from use of and . Follow through from their equation in part (e)(ii) irrespective of working shown; the final answer seen must be consistent with that equation for the final (A1) to be awarded. Do not accept answers taken from the graph. [2 marks] 3a. [2 marks] The cumulative frequency curve shows the percentage marks, given correct to the nearest integer, gained by 500 students in an examination. The passing grades were determined as given below. 85 to 100 %, grade A 66 to 84 %, B 57 to 65 %, C 50 to 56 %, grade D Those scoring less than 50 % failed the examination. Find the number of students who failed the examination. Markscheme 200 (students) (M1)(A1) (C2)
2g. [2 marks] Use the equation of the regression line on to estimate the circumference of a tree that is 40 m from the river bank. Markscheme (M1) (A1)(ft)(G2) Accept () for use of 3 sf. Accept from use of and . Follow through from their equation in part (e)(ii) irrespective of working shown; the final answer seen must be consistent with that equation for the final (A1) to be awarded. Do not accept answers taken from the graph. [2 marks] 3a. [2 marks] The cumulative frequency curve shows the percentage marks, given correct to the nearest integer, gained by 500 students in an examination. The passing grades were determined as given below. 85 to 100 %, grade A 66 to 84 %, B 57 to 65 %, C 50 to 56 %, grade D Those scoring less than 50 % failed the examination. Find the number of students who failed the examination. Markscheme 200 (students) (M1)(A1) (C2)
Chapter-11-test-review-key.docx