document.write( "Question 1047389: 10. Suppose that a certain brand of light bulbs has a mean life of 600 hours and a standard deviation of 53 hours. \r
\n" ); document.write( "\n" ); document.write( "According to the Empirical Rule, 99.7% of light bulbs have a lifetimes between ________ and ___________. \r
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\n" ); document.write( "\n" ); document.write( "11. Using information from #10, what percentage of light bulbs will last between 547 and 706 hours?
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Algebra.Com's Answer #662912 by ewatrrr(24785)\"\" \"About 
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10. Suppose that a certain brand of light bulbs has a mean life of 600 hours and a standard deviation of 53 hours.
\n" ); document.write( "According to the Empirical Rule:
\n" ); document.write( "one standard deviation from the mean accounts for about 68% of the set
\n" ); document.write( "two standard deviations from the mean account for about 95%
\n" ); document.write( "and three standard deviations from the mean account for about 99.7%.\r
\n" ); document.write( "\n" ); document.write( "99.7% of light bulbs have a lifetimes between 600 -159 and 600 + 159. \r
\n" ); document.write( "\n" ); document.write( "11. Using information from #10, what percentage of light bulbs will last between 547 and 706 hours?
\n" ); document.write( "The TI syntax is normalcdf(smaller, larger, µ, σ).
\n" ); document.write( "p = normalcdf(547, 706,600, 53)= .8186 0r 81.86%
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\n" ); document.write( "Recommend Using stattrek.com to check Results
\n" ); document.write( "until You are familiar with Using Your Calculator.
\n" ); document.write( "One could also Use Your Casio fx-115 ES plus 0r fx-991 ES plus
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