Suppose the average GPA of all students at a particular university is 2.8 (consider this the true population mean, with standard deviation 0.5 (consider this the true population standard deviation). a)  What is the z-score of a 3.5 GPA? b)  Suppose a student has GPA with a z-score of -0.5. What is the GPA of this student? c)  If GPA is normally distributed, what percentage of students should have a GPA with a corresponding z score between -2 and 2?

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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.