A new electric vehicle is designed to have a battery range of 400 miles and a standard deviation of 20 miles. Assume the battery range distribution is normally distributed. The company tests 39 vehicles to determine if the battery is operating at specifications. The average range of the 39 vehicles is 398 miles with a standard deviation of 20 miles. Find a 95% confidence interval for average battery range of the newly produced vehicle.

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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.