Internet service: An Internet service provider sampled 520 customers, and finds that 73 of them experienced an interruption in high-speed service during the previous month. Part 1 of 3 (a) Find a point estimate for the population proportion of all customers who experienced an interruption. Round the answer to at least three decimal places. The point estimate for the population proportion of all customers who experienced an interruption is 0.140 Alternate Answer: 0.14 Part: 1/3 Part 2 of 3 (b) Construct a 90% confidence interval for the proportion of all customers who experienced an interruption. Round the answers to at least three decimal places. A 90% confidence interval for the proportion of all customers who experienced an interruption is

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