Reply Mon 12 Sep, 2011 07:06 pm
a random function X has probability mass function
f(x)=kx^2/30 for=1,2,3,4,5.

a/ determine value of k
b/ find P(X is even)
c/ find P(X > or =3)
  • Topic Stats
  • Top Replies
  • Link to this Topic
Type: Question • Score: 0 • Views: 683 • Replies: 2
No top replies

Reply Mon 12 Sep, 2011 10:12 pm

there's something missing

Consider that y=f(k,x) & you've given x=1,2,...5 what are the corresponding y's\

IOW We need y1,y2,...y5 to predict k

0 Replies
Reply Tue 13 Sep, 2011 12:05 am
The values of f(x) must be non-negative and sum to 1. Therefore:
You should be able to figure out part (a) from that.

Given that P(x) = f(x) is the probability of x being selected, and now knowing the value of k, it should be easy to figure out P(2)+P(4) and P(3)+P(4)+P(5).
0 Replies

Related Topics

Amount of Time - Question by Randy Dandy
logical number sequence riddle - Question by feather
Calc help needed - Question by mjborowsky
HELP! The Product and Quotient Rules - Question by charsha
STRAIGHT LINES - Question by iqrasarguru
Possible Proof of the ABC Conjecture - Discussion by oralloy
Help with a simple math problem? - Question by Anonymous1234567890
How do I do this on a ti 84 calculator? - Question by Anonymous1234567890
  1. Forums
  2. » statistic
Copyright © 2022 MadLab, LLC :: Terms of Service :: Privacy Policy :: Page generated in 0.03 seconds on 05/21/2022 at 03:14:32