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A random sample of 30 firms dealing in wireless products was selected to determine the proportion of such firms that have implemented new software to

A random sample of 30 firms dealing in wireless products was selected to determine the proportion of such firms that have implemented new software to improve productivity. It turned out that 8 of the 30 had implemented such software. Find a 95% confidence interval on p, the true proportion of such firms that have implemented new software.

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