If x is a normal random variable with μ = 50 and σ = 6, then the probability that x is not between 44 and 56 is
If X is a normal random variable with μ =-2 and σ = 3, and has probability density function and cumulative density function fx (z), FX (z), calculate . P(-3< X < 0) F(1/4
X is a normal random variable with mean μ and standard deviation σ. Then P( μ− 1.6 σ ≤ X ≤ μ+ 2.6 σ) =? Answer to 4 decimal places.
Assume the random variable X is normally distributed with mean μ=50 and σ=7. Compute the probability. Be sure to draw a normal curve with the area corresponding to the probability shaded. (35<X<57) (35<X<57)=__?__ (Round to four decimal places as needed.)
Let the random variable X follow a normal distribution with μ =40 and σ^2 =81. The probability is 0.03 that X is in the symmetric interval about the mean between which two numbers? Round to one decimal place as needed. Use ascending order
Assume the random variable X is normally distributed with mean μ=50 and standard deviation σ=7. Compute the probability. Be sure to draw a normal curve with the area corresponding to the probability shaded. P(X>38)=________ (Round to four decimal places as needed.)
Assume the random variable x is normally distributed with mean μ=50 and standard deviation σ=7. Find the indicated probability. P(x>34)
Assume the random variable x is normally distributed with mean μ=50 and standard deviation σ=7. Find the indicated probability. P (x>38)
Given that x is a normal variable with mean μ = 44 and standard deviation σ = 6.1, find the following probabilities. (Round your answers to four decimal places.) (a) P(x ≤ 60) (b) P(x ≥ 50) (c) P(50 ≤ x ≤ 60)?
If X is a normal random variable with mean μ = 60 and standard deviation σ = 3, find a. P( X > 57 ) = b. P( X < 63 ) = c. P( 58 < X < 62 ) =
Suppose X is a normal random variable with mean μ = 100 and standard deviation σ = 10. Find a such that P(X ≥ a) = 0.04. (Round your answer to one decimal place.) a =