At age 9, the average weight (21.3 kg) and the average height (124.5 cm) for both boys and girls are exactly the same. A random sample of 9-year-olds yielded these results. Boys Girls Sample size 50 60 Mean height, cm 123.3 124.7 Population variance 98 120 Send data to Excel Use μ₁ for the average height for boys. Part: 0/2 Part 1 of 2 Estimate the mean difference in height between boys and girls with 99% confidence. Round your intermediate calculations to two decimal places and final answers to one decimal place.

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