The correct interpretation regarding the confidence interval is that we are 95% confident that the mean number of words used in all papers is between 20,995 and 22,905.
It means that we are x% confident that the population parameter(mean/proportion/standard deviation) is between a and b
In this problem, the 95% confidence interval for the number of words in the sample of 25 papers is (20,995, 22,905), hence the interpretation is that we are 95% confident that the mean number of words used in all papers is between 20,995 and 22,905.
More can be learned about confidence intervals at https://brainly.com/question/25890103