Question: 9 ) 386 randomly selected light bulbs were tested in a laboratory , 97 lasted more than 500 hours . Find a point estimate of

9 ) 386 randomly selected light bulbs were tested in a laboratory , 97 lasted more than 500 hours . Find a point estimate of the proportion of all light bulbs that last more than 500 hours . A ) 0. 749 B ) 0. 251 ( ) 0. 249 D ) 0. 201

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