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Supposed there were 4000 students took a test and the resulting scores were normally distributed. It is known as second quartile Q2 of the population

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Supposed there were 4000 students took a test and the resulting scores were normally distributed. It is known as second quartile Q2 of the population is 63.25 and the third quartile is 72.31. a. What is the average score of all students? b. What is the Standard Deviation of all students? c. What is the first quartile (11? d. About how ma nv students scored above 80

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