Suppose x is a discrete, binomial random variable

nachelle

How do I do this p(x<1) this sign has a _ under the <
n=6 p=0.1




Suppose x is a discrete, binomial random variable.

Calculate P(x > 2), given trails n = 8, success probability p = 0.3

[Hint: P(x > value) = 1 – P(x <= value) <= is a < with a _ under it

(tell me the number value you get)




Please I need help !

radou

A binomial random variable distribution is given by [tex]f(x)=\left( \begin{array}{c} n \\ x \end{array} \right) p^x (1-p)^{n-x}[/tex]. That's a starting point.

Edit: one more hint - the probability that a discrete random variable will have a value less or equal x is [tex]F(x) = P(X \leq x) = \sum_{i;x_{i}\leq x}f(x_{i})[/tex].

selfAdjoint

Use the \le construction in tex. Remove the blanks in the tags here to get it.
[ tex]p(x \le 1)[/tex ]
to get
[tex]p(x \le 1)[/tex]

nachelle

Thank you for your help with how to make the symbols.... I also need help with the answers

radou

[tex]P(x > 2) = 1 - P(x \leq 2)[/tex]
[tex]P(x \leq 2) = \left( \begin{array}{c} 8 \\ 0 \end{array} \right) 0.3^0 (1-0.3)^{8-0} + \cdots[/tex] (sum until x = 2, including that case)

I hope you know how to carry on now.