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Two-sample z interval for the difference of proportions

AP.STATS: UNC‑4 (EU), UNC‑4.K (LO), UNC‑4.K.1 (EK)
You might need: Calculator,Z table


Marta created an app, and she suspected that teens were more likely to use it than adults. She obtained separate random samples of teens and adults. Here are the results:
Use app?TeensAdults
She wants to use these results to construct a 95, percent confidence interval to estimate the difference between the proportions of teens and adults that use her app left parenthesis, p, start subscript, start text, T, end text, end subscript, minus, p, start subscript, start text, A, end text, end subscript, right parenthesis. Assume that all of the conditions for inference have been met.
Which of the following is a correct 95, percent confidence interval based on her data?
Choose 1 answer:
Choose 1 answer: