Advertiser that the mean income

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A magazine claims to its advertiser that the mean income of its readers is $75,000. One of the advertisers is skeptical and surveys 39 readers, finding that the average reader's income is $69,530 with a standard deviation of $9,920. Test to determine if the mean income is lower than the company's stated value using α = 0.025.

Reference no: EM132091155

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