Question: Show the working step by step to explain the calculation. Show answer in step 1, step 2, step 3, step 4. The average call duration

Show the working step by step to explain the calculation. Show

Show the working step by step to explain the calculation. Show answer in step 1, step 2, step 3, step 4. The average call duration of calls received by customer service team A is 21 minutes and the average call duration of calls received by customer service team B is 18 minutes. Assume the data were obtained from two samples with standard deviations of 3.8 minutes and 2.4 minutes respectively. The sample sizes are 8 calls for team A and 10 calls for team B. Can it be concluded at a=0.05 that the average call duration of two teams is different

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