Aug 19, 2017

Was Amazon’s coefficient of variation of open prices higher or lower than the coefficient of variation of its close prices?

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The monthly open, high, low, close prices and average trading volume of Amazon between September 2013 and August 2014 are given in the following table
(from: http://finance.yahoo.com/q/hp?s=AMZN&a=04&b=16&c=1997&d=07&e=12&f=2014&g=m) Date Open High Low Close Avg Vol Aug 1, 2014 313.69 320.38 304.59 318.33 3,910,000 Jul 1, 2014 325.86 364.85 311.86 312.99 4,751,300 Jun 2, 2014 312.59 340.72 303.84 324.78 3,769,700 May 1, 2014 304.13 314.87 284.38 312.55 3,944,700 Apr 1, 2014 338.09 348.30 288.00 304.13 6,779,300 Mar 3, 2014 358.74 383.11 330.88 336.37 3,788,100 Feb 3, 2014 358.98 365.87 337.73 362.10 4,573,200 Jan 2, 2014 398.80 408.06 357.76 358.69 4,626,900 Dec 2, 2013 399.00 405.63 379.50 398.79 2,746,800 Nov 1, 2013 365.63 394.10 341.88 393.62 2,830,600 Oct 1, 2013 314.22 368.40 296.50 364.03 3,467,900 Sep 3, 2013 284.73 320.57 284.17 312.64 2,254,600
a. Calculate the mean and the standard deviation of Amazon’s close prices during the following 6 months: Mar 2014-Aug. 2014. In addition, calculate the range of the average trading volume for all 12 months. Please submit your calculations (you can use a calculator for this section).

b. Was Amazon’s coefficient of variation of open prices higher or lower than the coefficient of variation of its close prices? Submit a printout of the data, descriptive statistics, and calculations performed in Excel, and a conclusion.

c. Please submit a histogram and a frequency table for Amazon average trading volume during 12 months, calculated using Excel, with respect to the bins: 2,000,000; 3,000,000; 4,000,000; … ; 7,000,000.


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