document.write( "Question 1197759: The average reading speed of fourth grade students is approximately normally distributed with a mean of 140 words per minute (wpm) and a standard deviation of 22 wpm.\r
\n" ); document.write( "\n" ); document.write( "The probability that the mean reading speed for a group of 32 fourth graders exceeds _________ is 10%. Give the value that fills in the blank, and include two digits after the decimal. \n" ); document.write( "

Algebra.Com's Answer #831194 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi  \r\n" );
document.write( "Normal Distribution: µ = 140,  and σ = 22 wpm\r\n" );
document.write( "The probability that the mean reading speed for a group of 32 fourth graders exceeds _________ is 10%.\r\n" );
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document.write( "Using TI or similarly an inexpensive calculator like an Casio fx-115 ES plus\r\n" );
document.write( "z = Invnorm(.90) = 9.5026\r\n" );
document.write( " x = 22*9.5026 + 140 = \r\n" );
document.write( "Wish You the Best in your Studies.\r\n" );
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