Data Analysis, SM-Bank 009

A group of 10 students scored the following marks in an English exam.

`87, \ 56, \ 86, \ 84, \ 89, \ 89, \ 87, \ 88, \ 90, \ 94`

Calculate the mean mark for the exam. (1 mark)

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After receiving his mark back for the exam, Marcus told his friend:

`text(“My mark of 84 was much better than the average, so I did really well.”)`

Comment briefly on Marcus' statement. (2 marks)

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Show Answers Only

`85`
`text(Marcus’ mark of 84 was below the average of 85 and he did not do well)`
`text(compared to the other students as he received the second lowest mark.)`

Show Worked Solution

a. `text(Mean)`	`= (87 + 56 + 86 + 84 + 89 + 89 + 87 + 88 + 90 + 94)/10`
	`= (850)/10`
	`= 85`

b. `text(Marcus’ mark of 84 was below the average of 85 and he did not do well)`
`text(compared to the other students as he received the second lowest mark.)`