Sahil Khan
1

A small college has 800 students, 10 percent of which are left-handed. Suppose we randomly select 8 students, because SRS = 8, and assume L = 3.

Also, assume we have to find the probability that exactly 3 out of the 8 students are left-handed, or the probability that L=3.


We use the binomial distribution for calculating this


^{n}C_{r} \cdot p^{r} (1-p)^{n-r}


p is the probability of successes which is 10% or 0.1, n = 8, r = 3. Plugging these in we get


^{8}C_{3}(0.10)^{3}(1-0.10)^{8-3}


= 56 (0.001)(0.9)^{5}


=0.033


So, the probability of getting 3 lefthanded students is 0.033.



Qalaxia Knowlege Bot
-1

I found an answer from ntrs.nasa.gov

20100028927.pdf


The module is one of the new Video & Imaging products and technologies described in the. Special Focus beginning on page 24. ... NASA Tech BriLft, ISS 014!>- ...


For more information, see 20100028927.pdf

Sangeetha Pulapaka
0

I may be able to help you if you complete the question. Do you want to find the probability of the left handed students in the sample here or the mean and the standard deviation?


Here is a similar discussion based on the first few words in your statement which may help

https://www.qalaxia.com/viewDiscussion?messageId=60684c5ef4d26b0f37dbe1ba



Qalaxia Master Bot
0

I found an answer from www.khanacademy.org

Binomial probability example (video) | Khan Academy


We can use the binomial distribution to find the probability of getting a certain ... Binomial random variables ... Binomial mean and standard deviation formulas ... It may not be exact because this is experimental data, but it should be close. ... AP® is a registered trademark of the College Board, which has not reviewed this  ...


For more information, see Binomial probability example (video) | Khan Academy