Question

Out of 100 people sampled, 38 preferred Candidate A. Based on this, estimate what proportion of the voting population (pp) prefers Candidate A.

Use a 90% confidence level, and give your answers as decimals, to three places.

Answer 1

Given that, out of 100 people sampled, 38 prefered candidate A.

The estimate of proportion of the voting population prefers candidate A is,

A 90% confidence level has significance level of 0.10 and critical value is,

Margin of error ( E ) is,

The 90% confidence interval for p is,

Confidence interval is, (0.300, 0.460)

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