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Chrome File Edit View History Bookmarks People Window Help Take a Test - Jessy Li 42%E) Tue 4:01 PM a Secure! https://www.mathxl.com/Student/PlayerTest.aspx?testid-169415630&centerwinayes; F17 latestart M13A7 40492 Intro Statistics (T Th 3-5:15P) Jessy Li 11/21/174:01 st: Chapter 6 Exam Submit This Question: 1 pt 80f 20 (2 complete) This Test: 20 pts po Use the standard normal distribution or the t-distribution to construct a 95% confidence interval for the population mean. Justify your decision if neither distribution can be used, explain why interpret the results. a random sample of 1 1 mortgage institutions, the mean interest rate was 3.57% and the standard deviation was 0.36%. Assume the interest rates are normally dist ted. Which distribution should be used to construct the confidence interval? 0 A B. C. D. Use a normal distribution because n

Explanation / Answer

The statistical software output for this problem is:

One sample T summary confidence interval:
: Mean of population

95% confidence interval results:

Hence,

Distribution: Option D is correct.

95% confidence interval: (3.33, 3.81)

Interpretation: Option C is correct.

Mean Sample Mean Std. Err. DF L. Limit U. Limit 3.57 0.10854408 10 3.3281487 3.8118513

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