document.write( "Question 1136666: 3.An electrical company claims that the average life of the bulbs it manufactures is 1200 hours with a standard deviation of 250 hours. If a random sample of 100 bulbs is chosen, \n" ); document.write( "
Algebra.Com's Answer #754473 by ikleyn(52813)\"\" \"About 
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\n" ); document.write( "Comment from student: 3.An electrical company claims that the average life of the bulbs it manufactures is 1200 hours
\n" ); document.write( "with a standard deviation of 250 hours. If a random sample of 100 bulbs is chosen,
\n" ); document.write( "a.What are the mean and standard error of the sampling distribution? (3 pts.)
\n" ); document.write( "b.What is the probability that the sample mean will be: b.1 At least 1150 hours? (4 pts.)
\n" ); document.write( "b.2 Less than 1250 hours? (4 pts.)
\n" ); document.write( "b.3 Between 1150 and 1250 hours? (4 pts.)
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\n" ); document.write( "\n" ); document.write( "My response :   As I said,  do not post to me personally  (please).\r
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\n" ); document.write( "\n" ); document.write( "            Re-post to the forum.\r
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