According to the American Freshman, the number of hours that college freshmen spend studying each week is normally distributed with a mean of 7 hours and a standard deviation of 5.3 hours. a) What percent of college freshmen study between 7 and 12.3 hours per week? b) What percent of college freshmen study more than 17.6 hours per week?

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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.