Question

Organise the following marks in a class assessment i
tabular form.
4,6,7,5,3,5,4,5,2,6,2,5,1,9,6,5,8,4,7
(i) Which number is the highest.
(ii) Which number is the lowest.
(iii) What is the range of the data
(iv) Find the arithmetic mean.​

Answer 1

Answer:

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Answer 2

$\huge \mathfrak \red{ = = answer = = }$

$1) \: \: highest \: \: number = 9$

$2) \: \: lowest \: number \: = 1$

$3) \: \: range = highest \: number - \\ \: \: \: \: \: lowest \: number \: .$

$9 - 1 \\ \bold\red{range = 8}$

$4) \\ mean=\frac{sum \: of \: observation}{number \: of \: observation}$

$\frac{1+ 2 \times 2 + 3 + 4 \times 3 + 5 \times 5 + 6 \times 4 + 7 \times 2 + 8 \times 1 + 9}{20}$

$\frac{1 + 4 + 3 + 12 + 25 + 24 + 14 + 18 + 9}{20}$

$= \frac{100}{20}$

$= \frac{10}{2}$

$\bold\red{mean =5 }$