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A marketing company claims that it receives 5% responses from its tele-sales. To test this claim, a random sample of 500 tele-sales were surveyed and

A marketing company claims that it receives 5% responses from its tele-sales. To test this claim, a random sample of 500 tele-sales were surveyed and 30 responses were received.Test the claim by the company at 90% significance level and advice(15)

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