Find the level of a two-sided confidence interval for t = 2.776 with sample size 5. express the answer as a percent.
1 answer:
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The simplified expression is the one in option B.
<h3>How to simplify the expression?</h3>Remember that:
With these two, we can rewrite the numerator as:
Replacing that in the given expression, we have:
Now, if we multiply and divide by cos(-x), we get:
Now remember that:
With these two properties:
Then the correct option is B.
If you want to learn more about trigonometric identities:
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