5. (5 points) Suppose that a company makes a battery, and the lifespan on the batteries have a mean of u = 14.4 hours an

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5 5 Points Suppose That A Company Makes A Battery And The Lifespan On The Batteries Have A Mean Of U 14 4 Hours An 1 (64.27 KiB) Viewed 17 times

5. (5 points) Suppose that a company makes a battery, and the lifespan on the batteries have a mean of u = 14.4 hours and standard deviation = 1.2 hours, normally distributed. If we select a random sample of n = 12 batteries, what is the probability that the sample would have a sample mean less than 13. 6. (16 points) Suppose that 34% of Oakton students have an evening or weekend class. If we ask 15 students at random, what is the probability that: (a) (4 points) exactly 5 have an evening or weekend class. (b) (4 points) 10 or more have an evening or weekend class. (c) (4 points) 6 or fewer have an evening or weekend class. (d) (4 points) at least one has an evening or weekend class.