A certain test preparation course is designed to help students improve their scores on the LSAT exam. A mock exam is given at the beginning and end of the course to determine the effectiveness of the course. The following measurements are the net change in 3 students' scores on the exam after completing the course: 13,12,7 Using these data, construct a 95% confidence interval for the average net change in a student's score after completing the course. Assume the population is approximately normal. sample mean: sample standard deviation: Critical value: lower and upper endpoints:

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A: Here Given  For change in Marks for 6 students Here ∑X=62 SAMPLE MEAN= x = ∑XN= 626=10.3333

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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.