A survey was conducted to determine what adults prefer in cell phone services. The results of the survey showed that 73% of cell phone users wanted e-mail services, with a margin of error of }4%. What is meant by the phrase "}4%"?
a. They estimate that 4% of the surveyed population may change their minds between the time that the poll was conducted and the time that the results were published.
b. There is a 4% chance that the true percentage of cell phone users who want e-mail service will not be in the interval (0.69, 0.77).
c. Only 4% of the population was surveyed.
d. It would be unlikely to get the observed sample proportion of 0.73 unless the actual proportion of cell phone users who want e-mail service is between 0.69 and 0.77.
e. The probability is .04 that the sample proportion is in the interval (0.69, 0.77).