The monthly closing stock prices (rounded to the nearest dollar) for Starbucks Corp. and Panera Bread Co. for the first six months of 2010 are reported in the following table.

a. Calculate the sample variance and the sample standard deviation for each firm’s stock price.
b. Which firm’s stock price had greater variability as measured by the standard deviation?
c. Which firm’s stock price had the greater relativedispersion?

Transcribed Image Text:

Month January 2010 February 2010 March 2010 April 2010 May 2010 June 2010 Starbucks Corp. $22 23 24 26 26 24 Panera Bread Co. $71 73 76 78 81 75