5. X is a normally distributed random variable with a mean of 9 and a standard deviation of 3.5. Find the value of X for which 70.54% of the area under the distribution curve lies to the right of it. (Note: the diagram is not necessarily to scale.) A) 7.74 M-90-3.5 X = 70.54 X B 8.06 C) 7.11 C D) 10.74 6. For a normal distribution with a mean of 6 and a standard deviation of 6, the value 9 has a z value of A) -0.5 B) 0.5 C) 1.5 D) 2.5 9-6 Le -3 Le B. .5 7. If the standard deviation of a normally distributed population is 60.0 and we take a sample of size 25, then the standard error of the mean is A) 12.0 B) 5.0 40.0 C) D) 2.4 60.0 25 = 2.4 X A)