Answer:
The centre line of the p chart is 0.03
Step-by-step explanation:
Given
Samples, n = 35
Packages, p = 25
Defective, d= 25
The centerline of a p-chart is the expected value of the proportions and is calculated based on sample data.
In this case, it is calculated as;
d/(p * s)
= 25/(25*35)
= 1/35
= 0.02857142857142857142857
= 0.03 ---- approximated
Hence, the centre line of the p chart is 0.03
