A survey developed by Babson College and the Association of Women’s Business Centers (WBCs) was distributed to WBCs in the United States. Of a representative sample of 20 WBCs, 40% reported that they had received funding from the national Small Business Association (SBA).

a) Check the assumptions and conditions for inference on proportions.

b) If it’s appropriate, find a 90% confidence interval for the proportion of WBCs that received SBA funding.