تم الحل ✓
categoryإحصاء
schoolبكالوريوس
event_available2026-07-15
السؤال
Transcribed Image Text:
An auto-maker does quality control tests on the paint thickness at different points on its car parts since there is some variability in the painting
process. A certain part has a target thickness of 2 mm. The distribution of thicknesses on this part is skewed to the right with a mean 2 mm and a
standard deviation of 0.5 mm. A quality control check on this part involves taking a random sample of 100 points and calculating the mean
thickness of those points.
1. What is the shape of the sampling distribution of the sample mean thickness?
2. Find the mean and standard deviation of the sampling distribution
the mean of the sample mean
the standard deviation of the sample mean
3. Assuming the stated mean and standard deviation of the thicknesses are correct, what is the approximate probability that the mean thickness in the sample
of 100 points is within 0.1 mm of the target value?
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