Suppose the number of minutes a single, randomly selected student is asleep during a lecture is uniformly distributed between 7 and 14 minutes.
(B) Over the course of the semester (say, 50 lectures), what is the probability that a randomly selected student will sleep a total of between 130 and 140 minutes?(Assume that the minutes slept in any lecture is independent of the number of minutes slept in any other lectures.)
(C) How many lectures must a student attend to be 95% sure that they will that they will have slept at least 28 minutes in total?Use the quadratic equation to solve for Q(C).

Question

anonymous · Answer

for part (C) (Hint: replace x with sqrt(n) to solve for n)

amistre64 · Answer

Suppose the number of minutes a single, randomly selected student is asleep during a lecture is uniformly distributed between 7 and 14 minutes.

amistre64 · Answer

(B) Over the course of 50 lectures, 

what is the probability will sleep a total of between 130 and 140 minutes?

(Assume that the minutes slept in any lecture is independent of the number of minutes slept in any other lectures.)

amistre64 · Answer

this one i aint got any idea yet

anonymous · Answer

damn. ye its a statistics question

amistre64 · Answer

it looks statisticy :)  im in stats this semester; so give me about 3 months lol

anonymous · Answer

oh k. so youve never done confidence intervals or hypothesis tests before?