51. The standard deviation of a probability distribution is: A. B. C. always positive the square ...
The t distribution is a discrete probability distribution. b) TrueFalseTrue The t distribution tends toward the standard normal distribution as the degrees of freedom increase. c) FalseTrueClick for List The t distribution has a greater variance than the standard normal distribution. d) FalseTrueClick for List If T is a random variable with a t distribution, then P(T < 0) = 0.5. e) FalseTrueFalse For the t distribution, the mean and variance are always equal.
Consider a normal distribution with mean 25 and standard
deviation 5. What is the probability a value selected at random
from this distribution is greater than 25? (Round your answer to
two decimal places.)
Assume that x has a normal distribution with the specified
mean and standard deviation. Find the indicated probability. (Round
your answer to four decimal places.)
μ = 14.9; σ = 3.5
P(10 ≤ x ≤ 26) =
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Assume that x has a...
4) The of a random variable x is equal to the positive square root of the variance. A) mean (B) standard deviation C) probability distribution D) variance . .. the son why
a. Consider a normal distribution with mean 20 and standard deviation 4. What is the probability a value selected at random from this distribution is greater than 20? (Round your answer to two decimal places. b. Assume that x has a normal distribution with the specified mean and standard deviation. Find the indicated probability. (Round your answer to four decimal places.) μ = 14.3; σ = 3.5 P(10 ≤ x ≤ 26) = c. Assume that x has a normal...
Consider a normal distribution with mean 35 and standard deviation 5. What is the probability a value selected at random from this distribution is greater than 35? (Round your answer to two decimal places.
Consider a normal distribution with mean 39 and standard deviation 7. What is the probability a value selected at random from this distribution is greater than 39? (Round your answer to two decimal places.)
4.B. Compute the variance square and Standard Deviation for the POISSON Distribution of: LAMBDA = 2.5 , t= 3 hr. and then find P(3) ?
Find the mean, variance, and standard deviation for the probability distribution. (Round your answers to two decimal places.)Pr(x)=x/28 ; x=1,2,3,4,5,6,7meanvariancestandard deviation
(c) The standard deviation of X must always be positive. (d) Adding a constant to a random variable does not effect the standard deviation
What are the expected value, variance and standard deviation of the following probability distribution? Number of Offices Proportion of Students p(X) 0 0.08 1 0.288 2 0.367 3 0.122 4 0.081 5 0.054 6 0.008 E(x) Var(x)