What is the estimated 95% confidence interval
What is the estimated 95% confidence interval
(CI) of the average blood vitamin D level of US landscapers in ng/mL?
Please note the following: 1) you might calculate a CI that is different from any of the multiple choice options listed below due to rounding differences, therefore select the closest match; 2) ensure you use either the large or small sample CI formula as appropriate; and 3) you may copy and paste the data into Excel to facilitate analysis.
Select one:
a. 46.9 to 49.7 ng/mL
b. 41.3 to 54.7 ng/mL
c. 42.0 to 55.9 ng/mL
d. 43.2 to 46.7 ng/mL
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