6. HighTech Inc. randomly tests its employees about company policies. Last year in the 420 random tests conducted, 18 employees failed the test. (UsetDistribution Table&zDistribution 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