Conduct a statistical test for problem

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A company believes that it controls more than 30% of the total market share for one of its products. To prove this belief, a random sample of 144 purchases of this product are contacted. It is found that 50 of the 144 purchases this company's brand of the product. If a researcher wants to conduct a statistical test for this problem, the observed z value would be?

Reference no: EM132950058

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