if x is a random variable with a normal distribution with a mean -7.2 and a variance 5.9. The value of X that is 1.67 from his standard deviation of his mean is...
if x is a random variable with a normal distribution with a mean -7.2 and a...
Problem 2. Assume that random variable X has normal distribution with mean 2 and standard deviation of 5 (1) Find the density of random variable Y = X3. (2) Find the mean and variance of random variable Y defined above in (1)
Let the random variable X follow a normal distribution with a mean of 17.1 and a standard deviation of 3.2. The normal probabilities are calculated using the table of standard normal distribution where the mean and standard deviations are, respectively: A) 1 and 1. B) 10 and 0. C) 0 and 1. D) 0 and 10.
a random variable X has a normal distribution with a mean of 17 ans standard deviation of 3.5 what is the z score for a value of 21.2
Given a random variable X follows a Normal distribution with mean 10 and standard deviation 5, what is the probability that X lies within one standard deviation of the mean?
If ? is a random variable that follows a normal distribution with a mean of 20 and standard deviation 3.2, what value of ? represents the 50th percentile?
Let X be a random variable with a normal distribution having a mean of 30 and a known standard deviation of 16. What is the probability that X is greater than 50? A- 0.1056 B- 0.6057 C- 0.3944 D- 0.8944
If random variable X has normal distribution with mean u=50 and the standard deviation q=2 , then the value of z-score corresponding to the value X =60 is : - 10 - 5 - 50 - 0
Question 1 (0.5 points) A random variable X follows a normal distribution with mean of 50 and standard deviation of 5. Suppose we take a simple random sample of size 6 from the population above. Can we calculate the probability that the sample mean is between 45 and 60? (You do not need to actually calculate the probability for this question.) Yes, and the calculated probability would be exact. Yes, and the calculated probability would be approximate. No. Question 2...
Suppose the random variable X follows a normal distribution with mean µ = 84 and standard deviation σ = 20. Calculate each of the following: P(X > 100) P(80 < X < 144) P(124 < X < 160) P(X < 50) P(X > X*) = .0062. What is the value of X*?
(b) Suppose that the random variable X has a normal distribution with mean μ and standard deviation σ. Which of the following is correct about the value x-μ+.28ơ i. The z-score of x is-0.58. ії. x is approximately .61 standard deviations above the mean. iii. There is approximately 39% chance of getting a value that is larger than x. iv. There is approximately 61% chance of getting a value that is larger than T v. r is approximately the 39th...