Small sample: During an economic downturn, 19 companies were sampled and asked whether they were planning to increase their workforce. Only 3 of the 19 companies were planning to increase their workforce. Use the small-sample method to construct a 90% confidence interval for the proportion of companies that are planning to increase their workforce. Round the answers to at least three decimal places. A 90% confidence interval for the proportion of companies that are planning to increase their workforce is