document.write( "Question 1204216: Replacement times for Maytag washer and dryer sets are normally distributed with a mean of 5.2 years and a standard deviation of 1.1 years.\r
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\n" ); document.write( "\n" ); document.write( "(a) Find the replacement time (in years) that separates the top 17 % from the bottom 83 %. \n" ); document.write( "

Algebra.Com's Answer #840321 by ikleyn(52781) $\"\"$ $\"About$

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\n" ); document.write( "Replacement times for Maytag washer and dryer sets are normally distributed with a mean of 5.2 years
\n" ); document.write( "and a standard deviation of 1.1 years.
\n" ); document.write( "Round all final answers to 3 decimals.
\n" ); document.write( "(a) Find the replacement time (in years) that separates the top 17 % from the bottom 83 %.
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document.write( "They want you find the z-mark on the time line under the normal curve, \r\n" );
document.write( "which separates the lower 0.83 area (on the left) from the upper 0.17 area (on the right).\r\n" );
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document.write( "Use the standard function invNorm of the regular hand calculator TI-83/84\r\n" );
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document.write( "The format is\r\n" );
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document.write( "                                              area on\r\n" );
document.write( "                                              the left  mean   SD\r\n" );
document.write( "    the replacement time (in years) = invNorm( 0.83,    5.2,   1.1)\r\n" );
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document.write( "The answer is  P = 6.25 years for the replacement time (rounded).\r\n" );
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document.write( "Alternativaly, you may use an online (free of charge) calculator at this web-site\r\n" );
document.write( "https://onlinestatbook.com/2/calculators/inverse_normal_dist.html\r\n" );
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document.write( "It has simple interface and shows the area of the interest under the normal curve,\r\n" );
document.write( "so it is very good tool to learn the subject, if you are a beginner student in such statistical calculations.\r\n" );
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document.write( "Of course, the online calculator will give you the same answer as the regular hand calculator TI-83/84.\r\n" );
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