Example formula: Lamda^k*e^-lamda / K!
Suppose that astronomers estimate that large meteors (above a certain size) hit the earth on average once every 100 years (lamda = 1 event per 100 years), and that the number of meteor hits follows a Poisson distribution. What is the probability of k = 4 meteors hits in the next 100 years?
See solution of the problem below
SOURCE: Poisson
Hello
To raise a number to any power you use the [^] caret key or on some calculators the [x^y] (x raised to exponent y)
20^(4) =160000
20 to the power of negative 3
20[^] 3 [(-) or +/-] ENTER gives 1.25x10^(-4) = 0.000125 (-) is the small minus sign.
If that gives you a syntax error
20[^] [(-) or +/-] 3[ENTER] = 0.000125
27 [^] (1/3] represents the cube root of 27 which is 3.
Hope it helps.
SOURCE: BINOMIAL DISTRIBUTION
Hello,
Let us start with a review of the formula for the binomial distribution
f(r;n,p)=n!/(r!(n-r)!)x(p^r)x(1-p)^(n-r)
But n!/(r!(n-r)!)=(nCr) you get
f(r;n,p)= (nCr)x(p^r)x(1-p)^(n-r)
Exemple : n=25, r=6, p=0.7
f(6;25,0.7)= 25 [PRB] [-->] 6 [ x ] {0.7[ ^] 6 }[ x ]{0.3[ ^ ]19}
The arrow means a horizontal scroll once to select the (nCr) function. [ x ] stands for the multiplication sign.
[ ^] is the raise to the power key
The { } are used here as parentheses to make formula legible.
Hoe it helps
Hope it helps
Hope it helps.
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