Question

15 An inter-decile range is similar to the inter-quartile range. Whereas the inter-quartile range is the range of the mid 5096, the inter- decile range is the range of the mid 80% of the distribution. What is the inter-decile range for SAT scores? SAT scores have a mean of 500 and a standard deviation of 100 16-17. Two questions Twenty points) in a huge lecture hall, 64% of the people prefer the number three to all other numbers. Three is their favorite number. If Leela takes a sample of 16 people, what is the probability that 10 or more of them (more than 0.625) will have three as their favorite number? Please use a normal approximation and please treat the distribution as if it were continuous 18. The probability of getting lost driving to Death Valley is very small; it is only 0.002. However, one weekend 3000 people plan to go there. What is the probability that exactly 4 people will get lost going to Death Valley? Use a Poisson distribution

Answer 1

Note:Here given three questions.As per HOMEWORKLIB RULES two questions enough.If you want to answer for remaining question please post it separately.

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