Catherine Chao, Director of Marketing Research, is evaluating consumer acceptance of a new toothpaste package.She randomly selects a sample of 200 households.Forty households prefer the new package to all other package designs.The 90% confidence interval for the population proportion is _________.

Select one:

a.0.199 to 0.201

b.0.153 to 0.247

c.0.145 to 0.255

d.0.164 to 0.236