The following data represent the number of hours that two different types of scientific pocket calculators operate before a recharge: is required. Use the rank-sum test with ? = 0.01 to determine if calculator A operates longer than calculator B on a full battery charge.

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Calculator A | Calculator B 5.556 63 4.6 5.3 50 6.2 5.8 5.1 3.8 4.8 4.3 4.2 4.0 4.9 4.5 5.2 4.5