A market research expert assumes that response rate in a poll is p=20 A large volume of n=400 questionnaires will be sent to randomly selected prospective customers. Variable (Y) denotes the total number of those who would respond. The sample proportion hatp=Y/n is going to be anaylzed
1. Determine parameters of approximate distribution for p
Answer:{90,8}
2. Evaluate the chance that response rate would exceed 17.5%
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3. Find approximate upper and lower fifth percentiles for p.
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I am not sure how to do 2 and 3
3 answers