SOLUTION: The mean of a list of 80 nos. is 230. If the four nos. 145,156,210 and 255 are added, what is the mean of the list of nos.
I asked this question yesterday and have been ponderin
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-> SOLUTION: The mean of a list of 80 nos. is 230. If the four nos. 145,156,210 and 255 are added, what is the mean of the list of nos.
I asked this question yesterday and have been ponderin
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Question 629654: The mean of a list of 80 nos. is 230. If the four nos. 145,156,210 and 255 are added, what is the mean of the list of nos.
I asked this question yesterday and have been pondering it since then. I think I have the solution but would you check it for me please.
Sum of 80 nos. is 18,400 80*230
Sum of 4 nos added is 766
Mean of new list is 19166/84=228.17
Thank you Answer by ewatrrr(24785) (Show Source):
Hi,
Good work!
Sum of 80 nos. is 18,400 80*230
Sum of 4 nos added is 766
Mean of new list is 19166/84=228.17
Re: TY, Yes! You are exactly correct. "Two-tailed" z = 1.75
Re: 110.25 for number of People...round 'Up' to .
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