A production process is checked periodically by a quality control inspector. The inspector selects simple random samples of 30 f
inished products and computes the sample mean product weights x¯. If test results over a long period of time show that 5% of x¯ the values are over 2.1 pounds and 5% are under 1.9 pounds, what are the mean and the standard deviation for the population of products produced with this process?
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Answer:
x = 49
Step-by-step explanation:
The third side of the largest of the inner triangles:
=
=
The side that continues next to 33: x -33
Applying similarity property on right triangles:
Hope this helps