Confidence interval concept. Mathematics & Economics Math Problem

Confidence Interval Concept
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Confidence Interval Concept.
According to Fleming, M.C. and Nellis, J.G.(2000), confidence interval is an interval estimate of the population parameter defined according to a specified level of confidence (probability).
My article of choice is: Increased Vegetable Intake Not Linked With Reduced Prostate Cancer Progression. (/article/increased-vegetable-intake-not-linked-reduced-pca-progression).
Published in the Urology Times, an expert clinical analysis, practice advice and policy perspective medical journal, this article is about a study called prospective Men’s Eating and Living (MEAL) Study that was conducted among four hundred and seventy eight (478) randomly selected men who were being monitored for early stage prostate cancer. The monitoring went on for twenty four (24) months with the men being encouraged to consume at least seven (7) servings of fruit or vegetables per day or read content about diet and prostate cancer.
Diet-based data and measurements of plasma carotenoids showed that behavioral...