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Category > Statistics Posted 19 Jun 2017 My Price 3.00

A random sample of 25 with a mean 80 is taken from a population of 1000 that is normally

A random sample of 25 with a mean 80 is taken from a population of 1000 that is normally distributed with a standard deviation of 30. Find ( a ) the 90%

( b ) the 95%

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Alpha Geek
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Status NEW Posted 19 Jun 2017 09:06 AM My Price 3.00

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file 1497865517-Answer.docx preview (57 words )
A-----------nsw-----------er ----------- Th-----------e d-----------ist-----------rib-----------uti-----------on -----------of -----------sam-----------ple----------- me-----------an -----------wil-----------l b-----------e a----------- no-----------rma-----------l d-----------ist-----------rib-----------uti-----------on -----------wit-----------h p-----------ara-----------met-----------ers-----------: H-----------enc-----------e, ----------- a-----------) F-----------or -----------90%----------- co-----------nfi-----------den-----------ce -----------int-----------erv-----------al,----------- z -----------= 1-----------.64-----------5 S-----------o, -----------90%----------- co-----------nfi-----------den-----------ce -----------int-----------erv-----------al -----------wil-----------l b-----------e: -----------(80----------- - -----------1.6-----------45*-----------5.9-----------3, -----------80 -----------+ 1-----------.64-----------5*5-----------.93-----------) (-----------70.-----------25,----------- 89-----------.75-----------) ----------- b)----------- F-----------or -----------95%----------- co-----------nfi-----------den-----------ce -----------int-----------erv-----------al,----------- z -----------= 1-----------.96----------- So-----------, 9-----------5% -----------con-----------fid-----------enc-----------e i-----------nte-----------rva-----------l w-----------ill----------- be-----------: (-----------80 ------------ 1-----------.96-----------*5.-----------93,----------- 80----------- + -----------1.9-----------6*5-----------.93-----------) (-----------68.-----------38,----------- 91-----------,62-----------) ----------- -----------
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