On a survey taken in 2018 and reported in the GSS data file,
the question, "How much of your communication is via text,
mobile phone, or internet?", was asked.
The summary results are as follows: Among 202 people who are
18-29 years old, 69 reported, "All or almost all of it." Among
166 people who are 40-49 years old, 50 reported, "All or almost
all of it."
a. Find the 97% confidence interval for the difference between
the proportions of...