What will happen to the length of the interval estimate if we have increase the confidence level say from 90% to 95% interval? Multiple Choice. Choose the correct answer.  a. the length of the interval becomes wider b. the length of the interval becomes narrower c. the length of the interval becomes wider by as much as 5% d. the length of the interval narrower by as much as 5% e. the length of the interval stays the same

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