If a pollster wishes to estimate the number of left-handed scientists. The sample that is needed in order to be 95% confident that the sample proportion will not differ from the true proportion by more than 4% is: 176.71.
Using this formula to find the sample
n =Z²π (1-π) ÷ e²
Where:
n =sample size =?
Z = Z -score for 95% confidence level =1.960
π = Population proportion = 0.08
e = Margin of error = 0.04
Let plug in the formula
n = 1.96² × 0.08 × (1 - 0.08) ÷ 0.04²
n = 3.8416× 0.08 × 0.92 ÷ 0.0016
n = 176.71
Therefore the sample is 176.71.
Learn more about sample size here:https://brainly.com/question/28583871
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