Scientists think that robots will play a crucial role in factories in the next several decades. Suppose that in an experiment to determine whether the use of robots to weave computer cables is feasible, a robot was used to assemble 500 cables. The cables were examined and there were 15 defectives. Assume human assemblers have a defect rate of .035 (3.5%) to test whether the proportion of defectives is lower for robots than for humans. Use a .01 significance level. What is the point estimate? (Use 2 decimal places).

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