A pollster is comparing samples drawn at different sizes from a population with proportion p.
If n is multiplied by 4, the standard deviation σ_p̂ is multiplied by what factor?
- Acheck_circle
1/2
- B
1/4
- C
2
- D
4
Explanation
σ_p̂ = √(p(1−p)/n). Multiplying n by 4 multiplies the SD by 1/√4 = 1/2.