Question

Asked Mar 21, 2019

Step 1

The exact population proportion is not given here. Therefore the population proportion can be assumed p cap as 0.5.

The confidence level is 80%.

Therefore, the level of significance is 0.20.

The margin of error is given as 0.05.

Step 2

The margin of error is defined as,

Step 3

α = 0.20.

(α/2) = 0.10.

The critical value can be found by the excel formula, =NORM.INV(0....

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