(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

Zoe Oneal

Answered question

2020-11-12

(a) The companys

Answer & Explanation

Khribechy

Khribechy

Skilled2020-11-13Added 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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