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Hi

see the attached

this is going to sound a little awkward but here is the rational - you are trying to do 2 separate calculations on the same data dimension - and to do that you really need 2 data sets

I took your excel sheet and made as copy of it and called one Male and the Other Female

I brought them into Tableau and used Union to append them together

there is a dimension Table Name that is used to address each data separately

this calculation looks at the table name and the Gender dimension and breaks out the results into 2 groups

now just bring them to the viz with avg for the aggregation

Jim

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