Question

Eight trials are simulated. The results are shown in the table.

What is the estimated margin of error, using standard deviation?



Enter your answer, rounded to two decimal places, in the box.

Answer 1

The answer will be 3.33

Hope this Help:)

Answer 2

6.22

Explanation:

First find the mean:

μ = (105+104+110+112+114+108+108+109) / 8

μ = 108.75

The standard deviation is then:

σ² = [(105-108.75)²+(104-108.75)²+(110-108.75)²+(112-108.75)²+(114-108.75)²+(108-108.75)²+(108-108.75)²+(109-108.75)²] / 8

σ² = 77.5 / 8

σ = 3.11

Margin of error is ±2σ, so ME = ±6.22.