Nilai ekspektasi: Béda antarrépisi
Konten dihapus Konten ditambahkan
Budhi (obrolan | kontribusi) Tidak ada ringkasan suntingan |
Budhi (obrolan | kontribusi) Tidak ada ringkasan suntingan |
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Baris ka-29:
The expected values of the powers of ''X'' are called the ''moments'' of ''X''; the [[moment about the mean|moments about the mean]] of ''X'' are also defined as certain expected values.
To empirically estimate the expected value of a random variable, one repeatedly measures values of the variable and computes the [[arithmetic mean]] of the results. This estimates the true expected value and has the property of minimizing the sum of the squares of the errors away from the expected value.
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