Arandom sample of 70 printers discovered that 25 of them were being used in small businesses. find the 95% limit for the population proportion of printers that are used in small businesses.

The sample proportion of printers used in small business is:

The 95% confidence interval for the population proportion of printers that are used in small businesses is:

Where:

is the critical value at 0.05 significance level

Therefore, the 95% confidence interval for the population proportion of printers that are used in small businesses is (0.245 , 0.469)

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