Question 1177045
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Hi
population chloride levels in healthy individuals residing in Florida:  σ = 38
n = 70, x̄ = 104
90% confidence interval for the true mean
 {{{z =blue (x - mu)/blue(sigma/sqrt(n))}}}
ME ={{{ 1.645*38/sqrt(70)}}} = 7.4714

104- 7.5 < {{{mu}}} < 104 + 7.5 

CI: (96.5 , 111.5 )

Wish You the Best in your Studies.
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