It is important that face masks used by firefighters be ableto withstand high
Chapter 7, Problem 54(choose chapter or problem)
It is important that face masks used by firefighters be ableto withstand high temperatures because firefighters commonlywork in temperatures of 200500F. In a test of onetype of mask, 11 of 55 masks had lenses pop out at 250.Construct a 90% CI for the true proportion of masks of thistype whose lenses would pop out at 250.
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