Question: please provide detailed answer for each part. 4.) (8 pts) According to a Gallup poll, 34% of adult Americans currently work on the weekends. Suppose

please provide detailed answer for each part.

4.) (8 pts) According to a Gallup poll, 34% of adult Americans currently work on the weekends. Suppose a random sample of 40 adults are chosen. Assume this is a binomial experiment. (a) Find the probability that 15 adults work on the weekends. Use StatCrunch. (b) Find the probability that at least 15 adults work on the weekends. Use StatCrunch. (c) In a random sample of 200 adults, what is the expected number of people who work on the weekends? What is the standard deviation? (d) If a random sample of 200 adults resulted in 80 adults who work on the weekends, would this be unusual? Why or why not? (Be sure to check whether the distribution of the random variable is symmetric before proceeding)

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