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Estimate the mean of the number of seagulls spotted on a beach by randomly selected visitors given in the following grouped frequency table. Round the

Estimate the mean of the number of seagulls spotted on a beach by randomly selected visitors given in the following grouped frequency table. Round the final answer to one decimal place. Value Interval Frequency 4-7 6 8-11 5 12-15 12 16-19 2

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