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The mean and standard deviation of a random sample of $n$ measurements equal 33.9 and 3.3 respectively.

Construct a 95% confidence interval for $n = 100$.

Hence I am trying to calculate margin of error and then use that to derive the sample size and then to construct my diagram. But the information given seems not to be enough.

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  • $\begingroup$ Ehh... can you work the term $n$ into your answer? $\endgroup$
    – Penguin_Knight
    Commented Mar 3, 2013 at 5:51
  • $\begingroup$ But n is not given.They say it is n-100 which is confusing. $\endgroup$
    – user2059072
    Commented Mar 3, 2013 at 5:59
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    $\begingroup$ I bet that's meant to say "n=100" $\endgroup$
    – Glen_b
    Commented Mar 3, 2013 at 8:28

1 Answer 1

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This sounds like a continuous data question

Standard dev=33.9 Conf.level = 0.95 z value = 1.96 Margin of Error =

ES = |P1-P0|/^P0(1-P0) is the formula for the E (margin of error)

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