A manufacturing plant has two assembly lines for producing glass bottles. The plant manager was concerned about whether the proportion of defective bottles differs between the two lines. Two independent random samples were selected and the following summary data computed: 
Find a 95% confidence interval for the true difference in proportion of defective bottles produced by the two assembly lines.
______________
Based on the interval above, can one conclude there is a difference in proportion of defective bottles produced by the two lines?
______________
Explain.
________________________________________________________
Definitions:
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