Question

if m is the mean of the scores x1,x2,x3,.....xn, then what is the mean of the score x1-a,x2-a,x3-a.....xn-a?

Answer 1

Answer:

m-a

Step-by-step explanation:

m=x1+x2+x3+......xn/n

nm=x1+x2+x3+.....xn -(i)

new sum of observation=x1-a+x2-a+x3-a+.......+xn-a

              =x1+x2+x3+......xn-na

              =nm-na  (from equation i)

new mean=new sum of observation/number of observation(n)

                =nm-na/n

                =m-a

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Answer 2

Answer:

see the above attachment for the answer mate

Step-by-step explanation:

hope this helps plz mark as brainlist ☺️☺️