SOLUTION: From past experience, it is known 90% of one-year-old children can distinguish their mother's voice from the voice of a similar sounding female. A random sample of 60 one-year-olds

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Question 234913: From past experience, it is known 90% of one-year-old children can distinguish their mother's voice from the voice of a similar sounding female. A random sample of 60 one-year-olds is given this voice recognition test.
Find the probability at most 56 of the children recognizes their mother's voice?
Find the probability that at least 45 of the children recognize their mother’s voice?
Find the probability that 50 to 58 (inclusive) children recognize their mother’s voice?
what would the Binomial Table with probabilities for this problem look?

Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
From past experience, it is known 90% of one-year-old children can distinguish their mother's voice from the voice of a similar sounding female. A random sample of 60 one-year-olds is given this voice recognition test.
Find the probability at most 56 of the children recognizes their mother's voice?
Find the probability that at least 45 of the children recognize their mother’s voice?
Find the probability that 50 to 58 (inclusive) children recognize their mother’s voice?
what would the Binomial Table with probabilities for this problem look?
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Your last sentence seems to imply that you should work
the problems (which are binomial) using a normal
approximation.
Is that true?
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Cheers,
Stan H.