(1 point) A choral conductor has 1949 singers in her choir, some of them are professional singers. The conductor wants to estimate what percentage of singers are professional, but can't ask all 1949, so she instead asks 614 singers in front and finds 21 who are professionals. (a) identify the population A. entire singers B. 21/1949 C. percentage of entire singers who are professional D. None of the above. (b) Identify the statistic. A. 1949 B. entire choir members C. 21/614 D. None of the above. (c) What specic type of bias does this scenario demonstrate? A. Voluntary response sampling B. Convenience Sampling C. It is representative of the population. D. None of the above. (d) identify the parameter A. range of values in which 95% values fall B. percentage of entire singers Who are professional C. 21 D. None of the above