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#1 Help Me ! » Help please » 2011-02-27 00:04:54
- DWC256
- Replies: 2
Question:
The weight in kilograms, w, of the 15 players in a rugby team was recorded and the results summarised as follows.
Sum of w = 1145.3
Sum of w^2 = 88042.14
...
Due to injury, one of the players who weighed 79.2kg was replaced with another player who weighed 63.5kg.
-- without further calculation state the effect of this change on the mean and and variance of the weight of the players in the team. Explain your answers.
Problem:
This is a 4 mark question. So how am I suppose to answer and score all marks -- rather than just saying that the mean and standard deviation would be lower as a result.
Many thanks in advance 
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