document.write( "Question 1175519: (Give your answers correct to TWO (2) decimal places)\r
\n" ); document.write( "\n" ); document.write( "In a butter cookies packing plant, the weight (in grams) of a pack of butter cookies packed is normally distributed. A random sample of 10 packs was drawn from the plant, and their weights were measured with the following results.\r
\n" ); document.write( "\n" ); document.write( "19.5 19.7 20.2 19.7 20.0
\n" ); document.write( "19.5 20.2 19.6 20.0 19.9\r
\n" ); document.write( "\n" ); document.write( "(a) Calculate the unbiased estimate for the population mean µ and the population standard deviation σ of the weight (in grams) of all butter cookies packed in the plant.\r
\n" ); document.write( "\n" ); document.write( "Answer: the unbiased estimate for µ is ____ grams,and the unbiased estimate for σ is ____ grams.\r
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\n" ); document.write( "\n" ); document.write( "(b) Find the 99% confidence interval for the population mean weight of butter cookies packed in the plant.\r
\n" ); document.write( "\n" ); document.write( "Answer: the 99% confidence interval for the population mean weight of butter cookies packed in the plant is from ____ grams to ____grams. \n" ); document.write( "

Algebra.Com's Answer #801295 by ewatrrr(24785) $\"\"$ $\"About$

You can put this solution on YOUR website!

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document.write( "Hi\r\n" );
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document.write( "a) mean = 19.83 and  s = .267\r\n" );
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document.write( "99% confidence Interval\r\n" );
document.write( "ME =\r\n" );
document.write( "ME = 2.576(.267)/√10) =  .22\r\n" );
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document.write( "CI = 19.83 ± .22\r\n" );
document.write( "from  19.61gm  to 20.05gm \r\n" );
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document.write( "Wish You the Best in your Studies.\r\n" );
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