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The marks obtained by 10 students in a maths test were 25, 24, 22, 23, x, 26, 21, 23, 22, and 27

The marks obtained by 10 students in a maths test were
25, 24, 22, 23, x, 26, 21, 23, 22, and 27
The sum of the squares of the marks = 5154
a) Calculate the
i) value of x.
ii) Standard deviation.
b) If each is increased by 3, write down the
i) New mean
ii) New Standard deviation.

Answers


sharon
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sharon kalunda answered the question on May 9, 2019 at 11:52

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