Question: Please answer this question Problem 4: 20 points = [5 + 5 + 10] A market research expert assumes that response rate in a poll

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Problem 4: 20 points = [5 + 5 + 10] A market research expert assumes that response rate in a poll is p = 0.20. 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, is going to be analyzed. Use Normal Approximation for a Sample Proportion to answer questions below. 1. Determine parameters of approximate distribution for 15 2. Evaluate the chance that response rate would exceed 17.5% 3. Find approximate upper and lower fth percentiles for $3. Solution

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