A particular manufacturer of refrigerators has come under fire as their $1,700 LGA model has failed for a significant portion of
owners. The LGA model often failed approximately 1-2 years after purchase, which is outside the warranty period. A class action lawsuit was filed by owners of the LGA model claiming that the manufacturer should repair or replace the units. The lawyer representing the class action lawsuit obtained a list of LGA owners who completed registration cards and asked a simple random sample of 1000 LGA owners, “Is your LGA refrigerator still working?” He also recorded the age of the refrigerator from information provided on the registration card. Here are the data:
Note 1: A more general solution is for some constant C.
Note 2: It might be tempting to say the general solution is , but that is not the case because and we can see that would only be true for C = 0, so that is why does not work.
for some constant C.
, but that is not the case because
and we can see that
would only be true for C = 0, so that is why