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6.1.31 Question Help | * Find the minimum sample size n needed to estimate μ for the given values of c, σ, and E. cz 0.98, ơ-7.7, and E: 1 Assume that a preliminary sample has at least 30 members. n(Round up to the nearest whole number.)
6.1.47 Question Help People were polled on how many books they read the previous year. How many subjects are needed to estimate the number of books read the previous year within one book with 95% confidence? initial survey results indicate that ơ-19 1 books. A 95% confidence level requires[] subjects. (Round up to the nearest whole number as needed.)
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