The four sides of a picture frame consist of two pieces selected from a population whose
Chapter 2, Problem 9(choose chapter or problem)
The four sides of a picture frame consist of two pieces selected from a population whose mean length is \(30 \mathrm{~cm}\) with standard deviation \(0.1 \mathrm{~cm}\), and two pieces selected from a population whose mean length is \(45 \mathrm{~cm}\) with standard deviation \0.3 \mathrm{~cm}\).
a. Find the mean perimeter.
b. Assuming the four pieces are chosen independently, find the standard deviation of the perimeter.
Equation Transcription:
Text Transcription:
30 cm
0.1 cm
45 cm
0.3 cm
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