Hello. You forgot to enter the answer options. The options are:
A. There are a fixed number of trials.
B. There are at least 5 successes and 5 failures.
C. The trials are done without replacement.
D. The sample is a simple random sample.
Answer:
C. The trials are done without replacement.
Explanation:
To build confidence intervals to estimate the difference between two populations, it is not necessary to carry out tests without replacement, since replacements are important to reduce errors and create more efficient and truthful intervals. However, to build these intervals it is necessary for the researcher to present a fixed number of attempts, analyze a simple random sample and present at least 5 successes and 5 failures.
Answer: B. The data must come from populations with approximately normal distributions.
Explanation: https://stattrek.com/estimation/difference-in-proportions.aspx
