Steel rods are manufactured with a mean length of 25 centimeters (cm). Because of variability in the
Question:
(a) What proportion of rods has a length less than 24.9 cm?
(b) Any rods that are shorter than 24.85 cm or longer than 25.15 cm are discarded. What proportion of rods will be discarded?
(c) Using the results of part (b), if 5000 rods are manufactured in a day, how many should the plant manager expect to discard?
(d) If an order comes in for 10,000 steel rods, how many rods should the plant manager manufacture if the order states that all rods must be between 24.9 cm and 25.1 cm?
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a z x 249 25007 143 From Table V the area to the left of z 143 is 00764 so P X 249 00764 Tech 00766 ...View the full answer
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