(a) The company's production equipment produces metal discs weighing 200 g. It should be noted that the weight of the discs corresponds to the normal

Zoe Oneal 2020-11-12 Answered
(a) The companys
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Khribechy
Answered 2020-11-13 Author has 100 answers

a)
The formula for estimation is:
μ=M±Z(sM)where:
M= sample mean
Z=Z statistic determined by confidence level
sM=standard error=(s2/n)
Step 2
Calculation
M=205
Z=2.58
sM=(72/20)=1.57
μ=M±Z(sM)
μ=205±2.581.57
μ=205±4.03
Result
M=205,99%CI[200.97,209.03]
Part b
Z Score Calculations
Z=(Mμ)/(σ2/n)
Z=(295300)/(8/20)
Z=5/0.63246
Z=7.90569
The value of z is -7.90569. The value of p is <.00001. The result is significant at p <.05

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