A random sample of 30 words from Jane Austens Pride and Prejudice had a mean length of
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A random sample of 30 words from Jane Austen’s Pride and Prejudice had a mean length of 4.08 letters with a standard deviation of 2.40. A random sample of 30 words from Henry James’s What Maisie Knew had a mean length of 3.85 letters with a standard deviation of 2.26. Which of the following is a correct expression for the 95% confidence interval for the difference in mean word length for these two novels?
a.
b.
c.
d.
e.
Select the best answer.
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