The article Microwave Observations of Daily Antarctic Sea Ice Edge Expansion and Contribution Rates (IEEE Geo sci and Remote Sensing Letters, 2006 54 58) states that The distribution of the daily sea ice advance retreat from each sensor is similar and is approximately double exponential The propose...

The article Microwave Observations of Daily Antarctic Sea Ice Edge Expansion and Contribution Rates (IEEE Geo sci.

Question:

The article "Microwave Observations of Daily Antarctic Sea Ice Edge Expansion and Contribution Rates" (IEEE Geo sci. and Remote Sensing Letters, 2006: 54-58) states that "The of the daily sea-ice advance/retreat from each sensor is similar and is approximately double exponential." The proposed double exponential has density function f (x) = .5 λe -|x| for - ∞ < x < ∞. The standard deviation is given as 40.9 km.
a. What is the value of the parameter λ?
b. What is the probability that the extent of daily sea ice change is within 1 standard deviation of the mean value?
Distribution
The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...