statistics

1. The quality-control inspector of a production plant will reject a batch of syringes if two or more defective syringes are found in a random sample of eight syringes taken from the batch. Suppse the batch contains 2% defective syringes. Find sigma.
Please show work.
Thanks

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  1. sigma = sqrt [np(1-p)]

    http://stattrek.com/Lesson2/Binomial.aspx

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  2. .099

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