Although there is a big difference in costs between two electric vehicles, model 1 and model 2, is there a difference in the range of miles for these vehicles between charges? Suppose that the results of driving tests are as follows. Standard Deviation Sample Size Car Mean model 1 231.2 12.4 40 model 2 235.3 17.3 40 (a) Calculate a point estimate for the difference in the average ranges (in miles) between charges for a model 1 car and a model 2 car. (Use umodel 1- Hmodel 2:) -4.1 mi What is the 95% margin of error (in miles) for the point estimate you found? (Round your answer to three decimal places.) 6.596 mi (b) Find a 99% confidence interval estimate for the difference in the average ranges (in miles) between charges for these electric models. (Use umodel 1- Hmodel 2. your answers to two decimal places.) Round |-12.99 X mi to 4.79 X mi Could you conclude that there is a significant difference in the average ranges?

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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.