QUESTION 8 A pair of fair dice is tossed. Find the probability of getting at most a total of 10. A. 18 18 B. , 7 C. D. 36 =2 11 E. 1935 12 QUESTION 9 If the standard deviation of the mean for the sampling distribution of random samples of size 144 from a large or infinite population is 10. How large must the sample size become if the standard deviation is to be reduced to 6? A. 200 B. 250 C. 300 D. 400 E. 500 STAT 273 QUESTION 10 PROBABILITY & STATISTICS The heights of students in a class are normally distributed with a mean of 65 inches and a standard deviation of 3 inches. What is the probability that a randomly selected student is taller than 70 inches? A. 0.1151 B. 0.0013 C. 0.0228 D. 0.1587 E. 0.0475 QUESTION 11 A bag contains 6 black balls and 4 white balls. Two balls are randomly selected without replacement. What is the probability that both balls are black? Round your answer to two decimal places. A. 0.15 B. 0.33 C. 0.24 D. 0.55 E. 0.82