A random variable has the following distribution :
| 0 | 1 | 2 | ||
|---|---|---|---|---|
| 0·4 | 0·1 |
The value of the constant is
Tap an option to check your answer.
1 mark, −0.25StatisticsRandom variables and standard distributionsRandom variables, PMFs, PDFs and CDFsEasyabout 1 min
JNU SSS 2012 Question 11: Random variables and standard distributions
Answer and worked solution
Checking your account…
Plain-text version
A random variable Y has the following distribution: | Y | -1 | 0 | 1 | 2 | P(Y) | 3C | 2C | 0·4 | 0·1 | The value of the constant C is (A) 0·10 (B) 0·15 (C) 0·20 (D) None of the above
Random variables and standard distributions has come up 173 times in 7 exams since 2005.
What this question tests
This question is on Random variables, PMFs, PDFs and CDFs, part of Random variables and standard distributions in Statistics.
Describing a random variable by its mass, density or distribution function.
TestStop has 33 past-paper questions on this subtopic.
Similar questions from other papers
- Given below are two statements: Assertion A: A random variable is a numerical description of the outcome of an experiment. Reason R: The particular numerical value of a…
- Suppose, a random variable X follows a Poisson distribution with parameter λ=25. The coefficient of variation of the distribution is (rounded off to two decimal places)
- It is given that Prob(-1≤ z≤ 1)=0.683, Prob(-2≤ z≤ 2)=0.954, and Prob(-3≤ z≤ 3)=0.997, when z follows a standard normal distribution. If X follows a normal distribution…
- Suppose that the random variable X takes on the values: -1, 0, and 2 with probability 1/8, 1/2 and 3/8. Find the expected value of X.
- If X is a continuous random variable whose probability density function is given by f_X(x) = { 1/x² for 1 < x < ∞; 0 elsewhere } Then the median of X is (in integer)
Question from the JNU SSS 2012 paper. Solutions are TestStop's own. Not affiliated with or endorsed by any examination authority.