An article in the Journal of the American Statistical Society (1990, vol. 85, pp. 972-985) measured the weight of 30 rats under experimental controls. Suppose there are 12 underweight rats. The. Calculate a bilateral 95% confidence interval for the true proportion of rats that would show overweight from the experiment. B. How big should the sample be if we want to be at least 95% confident of that the error in estimating p is less than 0.02, regardless of the true value of p

Q: Before After 6.9 6.3 3.6 2.1 7.3 7.1 12.8 8.6 8.5 8.2 10.1 6.4 8.4 3.9 5.2 2.1

A: We find the differences of ‘before’ and ‘after’. di= Xi-Yi

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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.