anonymous
  • anonymous
When the outliers are removed, how does the mean change? A. The mean increases by 2. B. The mean decreases by 2. C. The mean remains the same. D. There are no outliers.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
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ankit042
  • ankit042
can you find the mean and identify the outlier for the sample set?
anonymous
  • anonymous
23, 24,26, and 27?

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cwrw238
  • cwrw238
the points are symmetrical about the mean so ......
ankit042
  • ankit042
actually numbers apart from what you have mentioned are the outliers i.e (35,15) Now find the mean with and without outliers to get your answer
cwrw238
  • cwrw238
there is no need to calculate anything - just look at the distribution of the numbers on the line
anonymous
  • anonymous
Just look at it?
cwrw238
  • cwrw238
yes
cwrw238
  • cwrw238
look at the positions of the points either side of the number 25
anonymous
  • anonymous
There's two numbers and points on two sides, 25's in the middle
cwrw238
  • cwrw238
and how do the distances of these numbers compare on aither side of the 25?
cwrw238
  • cwrw238
do you see a symmetry ?
cwrw238
  • cwrw238
there are 3 numbers each side
cwrw238
  • cwrw238
24 and 26 are 1 unit either side of 25 23 and 27 are 2 units either side of 15 15 and 35 are 10 units either side of 25
cwrw238
  • cwrw238
so 25 is the mean of all those numbers
anonymous
  • anonymous
But don't you have to remove the outliers?
cwrw238
  • cwrw238
yes but if you remove the outliers does the mean change? is the 25 still the middle number?
cwrw238
  • cwrw238
the other numbers are still symmetrical about 25
anonymous
  • anonymous
Yeah it's still in the middle then so then the mean doesn't change
cwrw238
  • cwrw238
right

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