5. Suppose that a company makes a battery, and the lifespan on the batteries have a mean of μ = 14.4 hours and standard

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5. Suppose that a company makes a battery, and the lifespan on the batteries have a mean of μ = 14.4 hours and standard deviation o = 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 "x less than 13. 6. 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) exactly 5 have an evening or weekend class. (b) 10 or more have an evening or weekend class. (c) 6 or fewer have an evening or weekend class. (d) at least one has an evening or weekend class.