Alex and Brandon makes toys that require four 8 inch long sticks. Alex cuts four sticks one
Question:
Alex and Brandon makes toys that require four 8 inch long sticks. Alex cuts four sticks one at a time, and their lengths are independent. Alex's sticks have mean length 8 inches with a standard deviation 0.15 inches. Brandon clamps four sticks together and cuts them all at once, so that they all have the same length. Brandon's sticks also have a mean length of 8 inches with a standard deviation of 0.15 inches.
a) Alex's four sticks are laid end-to-end. What is the mean of the total length? What is the standard deviation of the total length?
b) Brandon's four sticks are laid end-to-end. What is the mean of the total length? What is the standard deviation of the total length?
c) Four sticks, two from Alex and two from Brandon are laid end-to-end. What is the mean of the total length? What is the standard deviation of the total length?
Elementary Statistics
ISBN: 978-0538733502
11th edition
Authors: Robert R. Johnson, Patricia J. Kuby