Mathematics, 04.02.2020 20:52, onlyceleste212

Asurvey among freshman at a certain university revealed that the number of hours spent studying before final exams was normally distributed with mean 25 and standard deviation 15. a sample of 36 students was selected. what is the probabiliy that the average time spent stydying for the sampe was between 28.2 and 30 hours

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Asurvey among freshman at a certain university revealed that the number of hours spent studying befo...