HighTech Inc. randomly tests its employees about company policies. Last year in the 420 random tests conducted, 18 employees failed the test. (Uset Distribution Table & z Distribution Table.) Required: a. What is the point estimate of the population proportion? (Round your answer to 1 decimal place.) b. What is the margin of error for a 90% confidence interval estimate? (Round your answer to 3 decimal places.) c. Compute the 90% confidence interval for the population proportion. (Round your answers to 3 decimal places.) d. Is it reasonable to conclude that 8% of the employees cannot pass the company policy test? multiple choice

• Yes
• No