Internet service: An Internet service provider sampled 530 customers, and finds that 70 of them experienced...

Internet service: An Internet service provider sampled 530 customers, and finds that 70 of them experienced an interruption in high-speed service during the previous month.

(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.

Expert Solution

We have given here,

x=70
n=530
Estimate for sample proportion

Level of significance is =1-0.90=0.1
Z critical value(using Z table)=1.645

orchestra answered 2 years ago

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