Let x be a normally distributed random variable with the following parameters: μ = 135.628 σ = 28.622   12 What is the probability that x will be below 100 ? a 0.1343 b 0.1243 c 0.1151 d 0.1066

Let x be a normally distributed random variable with the following parameter: μ = 125 σ = 30   11 What value of the x axis marks the top 25% of the distribution? a 151.1 b 148.1 c 145.2 d 142.4

Let X be the random variable with the following distribution: x: 1 2 3 4 5  P(X=x): k 0.04 0.3 0.2 0.3 Find the mean  four decimal places

If z is a standard normal random variable, then P (1.83 < z < 2.38) is: