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Why do most surveys ask for Gender, ethnicity, age, education ... ?Why do most surveys ask for Gender, ethnicity, age, education ... ? Lets see
Why do most surveys ask for Gender, ethnicity, age, education ... ?Why do most surveys ask for Gender, ethnicity, age, education ... ?
Lets see the clinical trials for Pfizer's vaccine.
Why do they need to know each volunteer's gender?
Why do they need to know each volunteer's ethinicity?
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