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  Discussion about math, puzzles, games and fun.   Useful symbols: √ ∞ ≠ ≤ ≥ ≈ ⇒ ∈ Δ θ ∴ ∑ ∫ π -




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Topic review (newest first)

2005-12-08 03:33:28

Can anyone help me with this question at all???

Consider two measurement situations. In the first the
sample mean X ~ N(, 10) and in the second the sample
mean X ~ N(, 2.5). If the variance of a component
Xi is 100, how many observations have been taken in the
two situations? In each case calculate the probability that
X is within 1 of .

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