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
Mean = 17, Standard deviation = 3.5
Z score for value of X = (X - Mean) / Standard deviation
Z score for value of 21.2 = (21.2 - 17) / 3.5 = 1.2
a random variable X has a normal distribution with a mean of 17 ans standard deviation...
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
(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...
help Assume a random variable Z has a standard normal distribution (mean 0 and standard deviation 1). Use all decimal places from the Normal Table. Your final answers to 4 decimal places. a) The probability that Z lies between 1.55 and 1.86 is Select b) What is the value of Z if only 1.5% of all possible Z values are larger? Select]
1) a normal distribution has a mean of 84 and standard deviation of 6 . find the z score corresponding to an x value of 76 2) a normal distribution has a mean of 55 and standard deviation of 2.7 . find the z score corresponding to an x value of 62
A Normal random variable X has mean 20 and standard deviation 4. Calculate the probability that specific values of X exceed 26. Calculate the 36th percentile of a Standard Normal random variable. A Standard Normal random variable Z falls within an interval of values centered around zero, that is the interval -z to z, with probability 0.6. Calculate the value of z that defines that interval. A truck makes daily round trips between Charlotte and Atlanta. On 30 percent of...
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)
If X has a normal distribution with mean μ and standard deviation σ, and Z is the standard normal random variable whose cumulative distribution function is P(Z s Z)-0(Z), then which of the following statements is NOT correct? O E. All of the given statements are not correct
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?
A continuous random variable x has a normal distribution either the mean of 70 and standard deviation of 12. If the x score for x is negative, then which of the following is true? A) x is less than 70 B) x cannot be greater than or equal to the mean C) x may be below 42 D) All of the above
The random variable x has a normal distribution with standard deviation 2525. It is known that the probability that x exceeds 159159 is .90. Find the mean μ of the probability distribution.