approximation


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approximation - anything that is intentionally similar but not exactly equal to something else.

Approximations of Interest Rate
Interest Rate Approximations: Approximates a yield rate of interest based on 4 methods:
1) Max Yield denoted as imax
2) Min Yield denoted as imin
3) Constant Ratio denoted as icr
4) Direct Ratio denoted as idr

Binomial Distribution
Calculates the probability of 3 separate events that follow a binomial distribution. It calculates the probability of exactly k successes, no more than k successes, and greater than k successes as well as the mean, variance, standard deviation, skewness and kurtosis.
Also calculates the normal approximation to the binomial distribution with and without the continuity correction factor
Calculates moment number t using the moment generating function

Bond Yield Rates
Calculates the yield rate of bonds using the Yield Approximation Method or the Bond Salesman Method.

Factorials
Calculates the following factorial items:
* A factorial of one number such as n!
* A factorial of a numerator divided by a factorial of a denominator such as n!m!/a!b!
* Double Factorials such as n!!
* Stirlings Approximation for n!

Rule of 72
Calculates how long it would take money to double (doubling time) using the rule of 72 interest approximation as well as showing the mathematical proof of the Rule of 72.