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08-05-2018
Biology

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From past experience, it is known that 90% of one-year-old children can distinguish their mother's voice from the voice of a similar sounding female. a random sample of 20 one-year-old children are given this voice recognition test. calculate the variance.

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jkaisgray jkaisgray

10-05-2018

1\20 all of 20 kids can know there mother name

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