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1.A T- Shirts manufacturing firm claims that its brand A of the T-Shirts outsells its brand by 8%. If it is found that 42 out

1.A T- Shirts manufacturing firm claims that its brand A of the T-Shirts outsells its brand by 8%. If it is found that 42 out of a sample of 200 students prefer brand A and 18 out of another random sample of 100 students prefer brand B, test whether the 8% difference is valid claim.

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