Example 9.6: What are the standard errors of the sample mean X and the sample proportion p?
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A: Find P(Z>2.53)=?
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Q: SUPPOSE X HAS A NORMAL DISTRIBUTION WITH µ= 20 AND σ=4. FIND P( 15 ≤ X ≤ 21
A: Given,mean(μ)=20standard deviation(σ)=4
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Example 9.6
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