Question

STANDARD DEVIATION

In 2020, Governor Pat Reynolds is going to be running against Waterloo native Michele Bachmann. A poll by the Acme Polling company gives this result:


Reynolds: 63%

Bachmann: 37%

margin of error: plus-or-minus 5%

What is the standard deviation?

Answer 1

0.1527

Explanation:

Standard Deviation = √p × q/n

Reynolds: 63%

Bachmann: 37%

n = 100

Standard Deviation = √0.63 × 0.37/100

= √(0.02331)

= 0.1526761278

≈ 0.1527