Question

calculate: PART A PART B PART C

PART A:

Out of 300 people sampled, 204 preferred Candidate A.

Based on this, find a 90% confidence level for the true proportion of the voting population (pp) prefers Candidate A.

Give your answers as decimals, to three places.

< pp <

PART B: In a sample of 390 adults, 289 had children. Construct a 95% confidence interval for the true population proportion of adults with children.

Give your answers as decimals, to three places

< p <

PART C:   

Out of 400 people sampled, 140 preferred Candidate A. Based on this, estimate what proportion of the voting population (p) prefers Candidate A.

Use a 95% confidence level, and give your answers as decimals, to three places.

< p <

Answer 1