Question

We wish to estimate what percent of adult residents in Ventura County like chocolate. Out of 400 adult residents sampled, 240 like chocolate. Based on this, construct a 90% confidence interval for the proportion (p) of adult residents who like chocolate in Ventura County. Enter your answer as an open-interval (i.e., parentheses) using decimals (not percents) accurate to three decimal places. Confidence interval = Express the same answer as a tri-linear inequality using decimals (not percents) accurate to three decimal places. < p < Express the same answer using the point estimate and margin of error. Give your answers as decimals, to three places. p = ± ±

Answer 1

Refer Standard normal table/Z-table or use excel function "=NORM.S.INV((1-0.05))" to find the Z-value.

Note: Include parenthesis (open brackets) when plugging in the answer.

------------------------------------------------------------------------------------------------------

------------------------------------------------------------------------------------------------------