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Estimate the true proportion of home

A report states that 38% of home owners had a vegetable garden. How large a sample is needed to estimate the true proportion of home owners who have vegetable gardens to within 4% with 95% confidence?

a. 142

b. 283

c. 566

d. 1132

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## Q : Binomial probability formula

Eighteen percent (0.18) of the students in a management class are graduate students. A random sample of 6 students is selected. Use the binomial probability formula to determine the probability that the sample contains exactly 2 graduate students.