The distribution of the sample means x can be approximated i

The distribution of the sample means x can be approximated if: n = 20. The distribution is not Normal. n = 38. The distribution is not normal with mux-= mu and sigma- = sigma. n = 16. The distribution is normal with mux-= mu and sigma-= sigma. n = 25. The distribution is normal mux-= mu and sigma- = sigma/ . A certain strain of bacteria occurs in all raw milk. If milk is not contaminated;, the distribution of bacteria in milk is roughly normal. The average bacteria count is mu = 2500 and standard deviation sigma = 300. If we select 42 random samples of the milk produced each day, what is the probability that the average bacteria count x for one day is between 2350 and 2650? 0.9994 0.9988 0.0006 0.7866 0.2234 Do you try to pad an insurance claim to cover your deductible? About 40% of all U.S. adults will try to pad their insurance claim this year. A director of an insurance adjustment office has just received 128 insurance claims to be processed. What is the probability that more than 80 of the claims are not padded? 51.2% 32% 25.1% 28.1% 26.7%

Solution

5. d

6. b

7. b