Statistics for Business & Economics
Statistics for Business & Economics
12th Edition
ISBN: 9781285528830
Author: David R. Anderson
Publisher: Cengage Learning US
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Chapter 20, Problem 25SE

The closing price of Apple stock, adjusted for splits and dividends, for the first trading day of December 2007–2011 are given below. The CPI for December of each year is also given (Yahoo Finance and the U.S. Census Bureau). Deflate the stock price series and comment on the financial performance of Apple stock.

Year Price ($) CPI
2007 198.08 210.0
2008 85.35 210.2
2009 210.73 215.9
2010 322.56 219.2
2011 405.00 225.7
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In the last three years, there have been changes of 55%, 3% and 2% in the production amount of a good, respectively. What is the geometric mean of the annual rate of change?
Go to Yahoo!Finance and download data at the MONTHLY frequency for the stock Apple Inc. with ticker AAPL with starting date January 1, 1990 and end date August 4, 2016. Use the ADJUSTED CLOSING PRICE to create the monthly RETURNS that are the percentage change of the adjusted closing price (NB: make sure to sort first the price from OLDEST TO NEWEST; the percentage return is 100 times the price change between the current and previous month divided by the price in the previous month). Based on the time series of the stock return, answer the following questions (NB: you should have 319 monthly returns): Calculate the sample mean or average of the stock return: Calculate the sample standard deviation of the stock return: !!! For the questions below, use the values for the mean and std. dev. that you typed above (only the first 2 decimals)!!! Assuming that the returns follow a normal distribution: Calculate the P(return > 2.21): Calculate the P(-12.37 x) = 0.9704: Calculate the lower…
c. Predict sales in 15 years.
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