According to a past poll conducted of Lexington residents, 52% indicated support for a light rail public transportation system within the city of Lexington. The sample size was 400 Lexington residents. Calculate a confidence interval for this poll using a 95% confidence level (using the formula for proportions). What is the range in which we would expect to find the true proportion of Lexington residents who support a light rail system? We will assume that the proportion from the total population is equal to the sample. If the sample size were to increase to 600 residents, what would happen to the confidence interval? Why?

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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.