Instruction 7.1 Times Spent Studying by Students in the Week Before Final

question 122

Essay

Instruction 7.1
Times spent studying by students in the week before final exams follow a normal distribution with a standard deviation of 8 hours. A random sample of 4 students was taken in order to estimate the mean study time for the population of all students.
-Referring to Instruction 7.1,what is the probability that the sample mean differs from the population mean by less than 2 hours?

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