Assume you want to determine whether the monthly movements in the Polish zloty against the dollar are

Question:

Assume you want to determine whether the monthly movements in the Polish zloty against the dollar are more volatile than monthly movements in some other currencies against the dollar. The zloty was valued at $.4602 on May 1, $.4709 on June 1, $.4888 on July 1, $.4406 on August 1, and $.4260 on September 1. Using Excel or another electronic spreadsheet, compute the standard deviation (a measure of volatility) of the zloty's monthly movements. Show your spreadsheet.
Exchange Rate
The value of one currency for the purpose of conversion to another. Exchange Rate means on any day, for purposes of determining the Dollar Equivalent of any currency other than Dollars, the rate at which such currency may be exchanged into Dollars...