Explore Random Variables: Examples & Equations
Recent questions in Random variables
College StatisticsAnswered question
gea3stwg 2022-01-27He following table shows the probability distribution for a discrete random variable. What is the variance of X?
X 11 14 16 19 21 23 24 29
P(X) 0.07 0.21 0.17 0.25 0.05 0.04 0.13 0.08
The mean of the discrete random variable X is 18.59.
X 11 14 16 19 21 23 24 29
P(X) 0.07 0.21 0.17 0.25 0.05 0.04 0.13 0.08
The mean of the discrete random variable X is 18.59.
College StatisticsAnswered question
taoigas 2022-01-27If you are calculating the standard deviation of measurements, how do you determine how many significant figures to use?
College StatisticsAnswered question
Turnseeuw 2022-01-27Can you find the standard deviation of negative numbers?
College StatisticsAnswered question
Alan Smith 2022-01-19How can you recognize a poisson distribution?
College StatisticsAnswered question
Quentin Johnson 2022-01-19What is the standard deviation of {1, 1, 1, 3, 3, 3}?
College StatisticsAnswered question
Sam Longoria 2022-01-19What is the standard deviation of {44, 46, 33, 10, 50, 27}?
College StatisticsAnswered question
obrozenecy6 2022-01-19If IQ scores are normally distributed with a mean of 100 and a standard deviation of 15, what is the probability of a random person scoring over 110?
College StatisticsAnswered question
hunterofdeath63 2022-01-19What is the standard deviation of just one number?
College StatisticsAnswered question
Cynthia Bell 2022-01-19A fair coin is tossed 60 times. Using the normal approximation to the binomial distribution, what is the probability that a head will show between 30 and 36 times inclusive?
College StatisticsAnswered question
Concepcion Hale 2022-01-19How do you determine the required value of the missing probability to make the following distribution a discrete probability distribution?
X P(x)
0 0.30
1 0.15
2 ?
3 0.20
4 0.15
5 0.05
X P(x)
0 0.30
1 0.15
2 ?
3 0.20
4 0.15
5 0.05
College StatisticsAnswered question
Helen Lewis 2022-01-19What is the sum of the probabilities in a probability distribution?
College StatisticsAnswered question
hvacwk 2022-01-19What is the difference between probability distribution and sampling distribution?
College StatisticsAnswered question
Julia White 2022-01-19How can you find standard deviation from a probability distribution?
College StatisticsAnswered question
Gwendolyn Willett 2022-01-19When is it appropriate to assume that data fits into a Poisson distribution?
College StatisticsAnswered question
Talamancoeb 2022-01-19Suppose that U has a uniform distribution on [0, 1] and that, conditional on U = u, the distribution of V is uniform on [0, u]. What is the probability density function of V?
College StatisticsAnswered question
Painevg 2022-01-19Is the temperature of a cup of coffee sitting on the counter related to the number of minutes since it was poured into the coffee cup a discrete or continuous graph?
College StatisticsAnswered question
Jessie Lee 2022-01-19Is the distance that a person throws a baseball a discrete or continuous variable?
College StatisticsAnswered question
hunterofdeath63 2022-01-19How is the law of large numbers related to probability?
College StatisticsAnswered question
kerrum75 2022-01-19You have studied the number of people waiting in line at your bank on Friday afternoon at 3 pm for many years, and have created a probability distribution for 0, 1, 2, 3, or 4 people in line. The probabilities are 0.1, 0.3, 0.4, 0.1, and 0.1, respectively. What is the expected number of people (mean) waiting in line at 3 pm on Friday afternoon?
College StatisticsAnswered question
berljivx8 2022-01-19What is an example of a continuous random variable?
When you have an equation that deals with random variables, always start with an explanation related to some random variable examples. It is what the majority of skilled engineers do because it is the only way how one can avoid mistakes when working with statistical data. Even though this part of statistics and probability may seem overly complex, approach every random variable equation through the lens of probability as you seek answers to your questions. Compare provided solutions, see similarities, and you will achieve the most efficient solutions.
