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appu · Credits: 514 My Scrapbook

in a group of 100 children, the weight of a child is 15kg.the standard error is 1.5kg.which one of the foll is true:
a.95% of all children weigh between 12 & 18 kg
b.95% of all chidren weigh bet 13.5 & 16.5kg
c.99% of all children weigh bet 12 & 18 kg
d.99% of all children weigh bet 13.5 & 16.5 kg
ans given here is b,well but....how does a weight of a single child help am i missing something?

tallpox · Credits: 12032 My Scrapbook

'a' makes statistical sense within 2sd .i would go for it

doctorgirl78 · Credits: 5366 My Scrapbook

theres a problem with the question......

standard ERROR is SD/sq root of n

SDeviation is what you are talking about if u say 95% fall within Mean +- 2 SD

check out the ques again

appu · Credits: 514 My Scrapbook

well the q in biostats buster is the same; on page 25 under standard error he doesnt mention the mean.its AIIMS MAY 2001.

Guest · Credits: 78204 My Scrapbook My Reading List 262569 Books

take it to be a typo .replace error with deviation and a is the answer

appu · Credits: 514 My Scrapbook

alright i replace the se with sd still a value of the element doesnt help me i need the mean dont i?

suneet · Credits: 6820 My Scrapbook

ans is a
1 s.d. 67%
2 s.d. 95% confidence limits
3 s.d 97%

shuvo · Credits: 4605 My Scrapbook My Reading List 11 Books

yes appu, u r right, it shud be the mean weight for that sample (mistake in the question?). SE is ok, since it says the error due to this very sample in representating the true population of children. considering 2sd/se on both side of the mean, .... a should be the answer.

aquarian · Credits: 257 My Scrapbook

shuvo can u pls explain how a is the ans ???

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