Answer:
95% of confidence intervals are
(197.706 , 198.294)
Step-by-step explanation:
<u><em>Explanation:-</em></u>
Given sample size 'n'=100
Mean of the sample x⁻ = 198
The standard deviation of the Americans =15
95% of confidence intervals are determined by
Level of significance = 0.05
Z₀.₀₅ = 1.96
=
= ( 198 -0.294 ,198 +0.294)
= (197.706 , 198.294)
95% of confidence intervals are
(197.706 , 198.294)