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Suppose the random variable XeN(45.7,3.1) represents the number of students in the Class who attend class...

Suppose the random variable XeN(45.7,3.1) represents the number of students in the Class who attend class at the beginneing of a lecture while random variable YeN(39.8,2.9) represents the number of students who return to lecture after the 10 min break (assume x and y are independent). Determine the probablilty that after the break there will be at least 6 fewer students in the lecture than there were before the break.

math   Statistics-And-Probability   
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Answer #1

SS SSB1098-16 emer vueuses XN Normal (45.7, 3-1) YN Normal (39.8, 2.9). By the property of normal distribution- T=x-Y) Normal

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