Question 1174401
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Hi
Note Table Below:
ME ={{{ z*sigma/sqrt(n)}}}
A.n=10, sample mean= 28, s=4.0, 90% confidence
 ME ={{{ 1.645*4/sqrt(10)}}}
28 - ME < {{{mu}}} < 28 + ME

B.n= 16, sample mean=50, s=4.2, 95% confidence
   ME ={{{ 1.96*4.2/sqrt(16)}}}
50 - ME < {{{mu}}} < 50 + ME

Wish You the Best in your Studies.

 = CI	z = value
90%	z =1.645
92%	z = 1.751
95%	z = 1.96
98%	z = 2.326
99%	z = 2.576
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