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Ive attached the following math 221 statistics

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Ive attached the following math 221 statistics questions i need help with.

 ATTACHMENT PREVIEW Download attachmentPeople were polled on how many books they read theprevious year. How many subjects are needed to esTmate thenumber of books read the previous year within one book with90 %conFdence? IniTal survey results indicate that sigmaEquals 10.4 books.A 90 %conFdence level requires nothingsubjects

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