The National Weight Control Registry tries to mine secrets of success from people who lost at least 30 pounds and kept it off for at least a year. It reports that out of 2,720 registrants, 439 were on a low-carbohydrate diet (less than 90 grams a day). a. Develop a 95% confidence interval for the proportion of people on a low-carbohydrate diet. b. Is it possible that the population percentage is 16%? c. How large a sample is needed to estimate the proportion within 0.55%?

Q: Self-Reported Health Status Excellent 30 Very Good 80 Good 100 Fair 60 Рor 30 TOTAL 300

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A: a).

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.