Asked by Sean
For the multinomial distribution:
Show that summation of the probability mass function across all possible values equals 1.
Show via summation of the probability mass function that the expected value of Y_i = n * p_i
The textbook that I'm using left the above as "exercises to the reader". I've wracked my brain and am completely stumped on how to get started.
Show that summation of the probability mass function across all possible values equals 1.
Show via summation of the probability mass function that the expected value of Y_i = n * p_i
The textbook that I'm using left the above as "exercises to the reader". I've wracked my brain and am completely stumped on how to get started.
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