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A choral conductor has 1634 singers in her choir, some of them are professional singers. The...

A choral conductor has 1634 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 1634, so she instead asks 602 singers in front and finds 25 who are professionals. (a) Identify the parameter (b) Identify the sample (c) What specific type of bias does this scenario demonstrate (d) Identify the population?

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Answer #1

a)The parameter is the percentage of the professional singer in the choir of the choral conductor (P) which is estimated by sample percentage (4.15%).

b) Sample consist of 602 singers in the front (that is selected by convenience sampling).

c) The scenario depicts selection bias in sampling as only singers standing in front are asked and hence sample may not be representative of the population.

d) Population consist of 1634 singers of the choir of the choral conductor.

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