It is thought by Movie distributors that 60% of young adults at university in Australia look forward to the release of the next movie in the DC or Marvel Comic series. Consider if random samples of 200 young adults were taken to test this population value. a. What is the mean of the sampling distribution of all sample proportions, for this size? Give one decimal place. (1 mark) E b. What is the standard deviation of the sampling distribution of all sample proportions, for this size? Give four decimal places. (2 marks) S