An airport bus driver conducted a study to see what proportion of customers use the shuttle bus to get to and from the parking lot. The results of his study showed that from 48 surveyed customers 30 used the bus and 18 walked
1) Construct a 90% confidence interval for p, the true proportion of all the people who used the bus.
2) The management of the airport claims that about 60% of the customers used the bus. Can this statement be supported by the results obtained from the confidence interval construction implemented in 1)?
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