In a course where the mean final exam grade is 68 with a standard deviation of 6.5, the grading scheme is as follows: The top 20% get As, next 25% get Bs, next 25% get Cs, next 10% get Ds, and the rest get Fs.  Assume that the scores are normally distributed. What exam grade is the (minimum) cutoff for a C?

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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.