document.write( "Question 223174: The time it takes to travel from home to the office is normally distributed with \"mu=+25\" minutes and \"sigma+=+5\" minutes.
\n" ); document.write( "a. What is the probability the trip takes more than 20 minutes?
\n" ); document.write( "b. What is the probability the trip takes less than 15 minutes.
\n" ); document.write( "c. What is the probability the trip takes between 30 and 35 minutes?
\n" ); document.write( "d. What is the probability the trip takes more than 40 minutes? \n" ); document.write( "
Algebra.Com's Answer #166944 by Edwin McCravy(20060)\"\" \"About 
You can put this solution on YOUR website!
The time it takes to travel from home to the office is normally distributed with \"mu=+25\" minutes and \"sigma+=+5\" minutes.\r
\n" ); document.write( "\n" ); document.write( "a. What is the probability the trip takes more than 20 minutes?
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\r\n" );
document.write( "        On your TI-83 or TI-84 calculator:\r\n" );
document.write( "\r\n" );
document.write( "        1.  Press CLEAR\r\n" );
document.write( "        2.  Press 2ND \r\n" );
document.write( "        3.  Press VARS \r\n" );
document.write( "        4.  Press 2\r\n" );
document.write( "        6.  You see normalcdf( \r\n" );
document.write( "        7.  After that type in:  20,999999999,25,5) so that what you see\r\n" );
document.write( "            is this \r\n" );
document.write( "            \r\n" );
document.write( "            normalcdf(20,999\r\n" );
document.write( "            999999,25,5)\r\n" );
document.write( "\r\n" );
document.write( "        8.  Press ENTER\r\n" );
document.write( "        9.  Read the answer .8413447404          \r\n" );
document.write( "\r\n" );
document.write( "

\n" ); document.write( "b. What is the probability the trip takes less than 15 minutes.
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\r\n" );
document.write( "        1.  Press CLEAR\r\n" );
document.write( "        2.  Press 2ND \r\n" );
document.write( "        3.  Press VARS \r\n" );
document.write( "        4.  Press 2\r\n" );
document.write( "        6.  You see normalcdf( \r\n" );
document.write( "        7.  After that type in:  -999999999,15,25,5) so that what you see\r\n" );
document.write( "            is this: \r\n" );
document.write( "            \r\n" );
document.write( "            normalcdf(-99999\r\n" );
document.write( "            9999,15,25,5)\r\n" );
document.write( "            \r\n" );
document.write( "            Caution: be sure that the \"-\" is the NEGATIVE sign on the\r\n" );
document.write( "            very bottom right button, that looks liks this (-), and NOT\r\n" );
document.write( "            the minus sign above the + button. \r\n" );
document.write( "               \r\n" );
document.write( "        8.  Press ENTER\r\n" );
document.write( "        9.  Read the answer .022750062\r\n" );
document.write( "

\n" ); document.write( "c. What is the probability the trip takes between 30 and 35 minutes?
\n" ); document.write( "
\r\n" );
document.write( "     1.  Press CLEAR\r\n" );
document.write( "        2.  Press 2ND \r\n" );
document.write( "        3.  Press VARS \r\n" );
document.write( "        4.  Press 2\r\n" );
document.write( "        6.  You see normalcdf( \r\n" );
document.write( "        7.  After that type in:  30,35,25,5) so that what you see\r\n" );
document.write( "            is this \r\n" );
document.write( "            \r\n" );
document.write( "            normalcdf(30,35,\r\n" );
document.write( "            25,5)\r\n" );
document.write( "\r\n" );
document.write( "        8.  Press ENTER\r\n" );
document.write( "        9.  Read the answer .1359051975  \r\n" );
document.write( "\r\n" );
document.write( "

\n" ); document.write( "d. What is the probability the trip takes more than 40 minutes?
\n" ); document.write( "
\r\n" );
document.write( "\r\n" );
document.write( "        1.  Press CLEAR\r\n" );
document.write( "        2.  Press 2ND \r\n" );
document.write( "        3.  Press VARS \r\n" );
document.write( "        4.  Press 2\r\n" );
document.write( "        6.  You see normalcdf( \r\n" );
document.write( "        7.  After that type in:  40,999999999,25,5) so that \r\n" );
document.write( "            what you see is this \r\n" );
document.write( "            \r\n" );
document.write( "            normalcdf(40,999\r\n" );
document.write( "            999999,25,5)\r\n" );
document.write( "\r\n" );
document.write( "        8.  Press ENTER\r\n" );
document.write( "        9.  Read the answer .0013499672  \r\n" );
document.write( "\r\n" );
document.write( "If you're supposed to use tables and not a calculator, then\r\n" );
document.write( "post again telling us whether you have the kind of tables\r\n" );
document.write( "with both negative and positive z-scores or whether you have\r\n" );
document.write( "the kind with onl;y positive z-scores.\r\n" );
document.write( "\r\n" );
document.write( "Edwin

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