Question
Show all work. The health of employees is monitored by periodically weighing them in. A sample...
Show all work.
The health of employees is monitored by periodically weighing them in. A sample of 54 employees has a mean weight of 183.9 lb. Assuming that σ is known to be 121.2 lb, create as 85% confidence interval for the mean weight.
Homework Answers
Answer #1
Given,
X_bar = 183.9
n = 54
= 121.2
Calculate 85% of confidence interval
CI = x_bar 
z*(/
n)
z value for 85% of confidence interval is 1.44
CI = 183.9
1.44*(121.2/54)
= 183.9
23.750
CI = 183.9 - 23.75 and CI = 183.9+23.75
= 160.15 and CI = 207.65
Therefore 85% of confidence interval is (160.15,207.65).
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