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sample mean and sample variance?
Exercise 3.45 METHODS AND APPLICATIONS
The following frequency distribution summarizes the weights of 203 fish caught by anglers participating in a professional bass fishing tournament.
Weight (Pounds) Frequency
1-3 54
4-6 122
7-9 24
10-12 3
I do not know which numbers to use to find the sample mean. Do I use the median of the weights or the average of the two numbers.