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What is the point estimate for the true difference between the two different population means?

Weight of laptop #1: 122, 122, 121, 119, 120, 121, 120, 122, 120, 122, 122

Weight of laptop #2: 119, 123, 122, 120, 121, 119, 120, 123, 117, 118, 123, 117, 118

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