With n = 16, x̄ = 50, s = 8, t (95%, df=15) ≈ 2.131. ME ≈

4.3 SE = s/√n = 8/4 = 2; ME = 2.131·2 ≈ 4.26 ≈ 4.3.

Constructing a Confidence Interval for a Population Mean

AP Statistics· difficulty 4/5

With n = 16, x̄ = 50, s = 8, t* (95%, df=15) \approx 2.131. ME \approx

Explanation

SE = s/\sqrtn = 8/4 = 2; ME = 2.131\cdot2 \approx 4.26 \approx 4.3.

Want 10 more like this — adaptive to your weak spots?