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...

      

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 is 5154.
Calculate the
(i) Value of x
(ii) Standard deviation
(b) If each mark 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 August 23, 2019 at 14:01


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