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Mathematics, 18.01.2021 01:50 samsavage4073

Income tax returns show that the mean income of self-employed persons in a particular year was £15,000, with a standard deviation of £975. A random sample of 169 returns from people in the clothing industry gave a mean income of £14,500. Did this indicate that income from self-employment in the clothing industry was significantly different?

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Income tax returns show that the mean income of self-employed persons in a particular year was £15,0...
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