QUESTION 13 Find the value of the standard error and margin of error(E) for a confidence level of 70%, n=40 and $sigma$= 12.36. Round your answers to two decimal places. a. 1.90, 2.00 b. 2.00, 1.98 c. 1.95, 2.02 d. 1.95, 2.00
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We are given a confidence level of 70%. To find the corresponding z-score, we can use a z-table or calculator. For a 70% confidence level, we have 15% in each tail (100% - 70% = 30%, and 30%/2 = 15%). The z-score corresponding to 85% (70% + 15%) is approximately Show more…
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