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In a survey of 1280 mortgage holders, 448 were late in payments on their mortgage. Make...

In a survey of 1280 mortgage holders, 448 were late in payments on their mortgage. Make an 88% confidence interval for the true proportion of mortgage holders who are late on payments. Check conditions. a) The Bank is unhappy with the above survey and want to do a new survey. They want to be accurate within 1% of the population proportion. They want a 90% confidence level. How large a sample does the Bank need? (you may use whatever information from part a that you need)

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