Suppose that X is a normal random variable with a mean of μ = -50 and a standard deviation of a = 8. Determine the value of x so that Pr[X > x] = Pr[Z > -0.75], where Z is the standard normal random variable. ⒸA. 56 OB. 44 O C.-6 OD. -44 O E.-56

Let X be a normally distributed random variable with a mean of 12 and a standard deviation of 1.25. What proportion of the values of X are less than 14? 0.945 0.933 0.625 None of these choices

CALL CENTERExcopt for PANAMA) 1-800-SAMSUNG (1-800-726-75 6. For a population with a mean of u = 100 and a standard deviation of o = 20, a. Find the z-score for each of the following X values. X = 108 X = 115 X = 130 %3D %3D %3D X = 90 b. Find the score (X value) that corresponds to each of the following z-scores. X = 88 X = 95 z = -0.40 z = -0.50 z = 1.80 z = 0.75 Z = 1.50 Z = -1.25

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