Final answer:
It is false that most deafness isn't hereditary. About 2 per 1,000 babies are born with significant hearing loss in healthy baby nurseries, and the probability that exactly two babies are born deaf from a sample of 1,000 can be calculated using the binomial probability formula.
Step-by-step explanation:
It is false that most deafness isn't hereditary; however, it is true that a significant percentage of deaf children are born to hearing parents who may not know sign language. The recent statistics indicate that there is an average of 2 per 1,000 babies born with significant hearing loss in a healthy baby nursery. When computing the probability that exactly two babies out of 1,000 surveyed were born deaf, we use the binomial probability formula P(x) = (nCx) * (p^x) * (q^(n-x)), where 'n' is the number of trials, 'x' is the number of successes (in this case, deaf babies), 'p' is the probability of success on a single trial, and 'q' is the probability of failure on a single trial. From this, the probability 'p' of a baby being born deaf is 2/1000, and 'q' is therefore 998/1000. Applying these figures to the formula gives us P(2) = (1000C2) * (0.002^2) * (0.998^998), which we can calculate to find the specific probability. When it comes to decisions about education and communication methods for a deaf child, parents' choices might differ based on various factors, including whether they are also deaf.