Q1. A random sample of 100 patients treated in a program for alcoholism and drug dependency over the past 10 years was selected. It was determined that 53 of the patients had been readmitted to the program at least once. At the 95% level, construct an estimate for the population proportion. Q2. You are the consumer affairs reporter for a daily newspaper. Part of your job is to investigate the claims of manufacturers, and you are particularly suspicious of a new economy car that the manufacturer claims will get 3.0L/100km. After checking the mileage figures for a random sample of 120 owners of this car, you find an average L/100km of 3.1 with a standard deviation of 3.7. At the 99% level, do your results tend to confirm or refute the manufacturer’s claims?
Q1. A random sample of 100 patients treated in a program for
alcoholism and drug dependency over the past 10 years was
selected. It was determined that 53 of the patients had been
readmitted to the program at least once.
At the 95% level, construct an estimate for the population
proportion.
Q2. You are the consumer affairs reporter for a daily newspaper.
Part of your job is to investigate the claims of manufacturers, and
you are particularly suspicious of a new economy car that the
manufacturer claims will get 3.0L/100km. After checking the
mileage figures for a random sample of 120 owners of this car, you
find an average L/100km of 3.1 with a standard deviation of 3.7.
At the 99% level, do your results tend to confirm or refute the
manufacturer’s claims?
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