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Category > Statistics Posted 26 May 2017 My Price 7.00

Construct a 95% confidence interval for the population variance

To analyze the risk, or volatility, associated with investing inChevron Corporation common stock, a sample of the monthly total percentage return for 12 months was taken. The returns for the 12months of 2005 are shown here (Compustat, February 24, 2006). Total return is price appreciation plus any dividend paid.

  • Month Return (%) Month Return (%)
    January
    3.60
    		   July
    3.74
    		  
    February
    14.86
    		   August
    6.62
    		  
    March
    -6.07
    		   September
    5.42
    		  
    April
    -10.82
    		   October
    -11.83
    		  
    May
    4.29
    		   November
    1.21
    		  
    June
    3.98
    		   December
    -.94
    		  


  1. Compute the sample variance and sample standard deviation as a measure of the volatility of monthly total return for Chevron (to 2decimals).
    Sample variance
     
    Sample standard deviation
     


  2. Construct a 95% confidence interval for the population variance(to 2 decimals).
    (
     
    ,
     
    )

  3. Construct a 95% confidence interval for the population standard deviation (to 2 decimals).
    (
     
    ,
     
    )

Answers

Alpha Geek
(8)
Status NEW Posted 26 May 2017 03:05 PM My Price 7.00

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file 1495812928-1783621_1_636312843189616873_1783621.xlsx preview (123 words )
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