Question Completion Status: 4 1 5 6 7 81 919 101 115 12 13 146 15 161 17 180 192 20 210 220 23 241 25 261 271 28 29 306 31 After rounding off both the mean and standard deviation to one decimal place, the z score ( to 2 decimal places) of 34 is. O a.z = 0.69 O b.z =-0.70 O c.z=-0.71 O d.z=-0.69 O e. None of these QUESTION 28 The I.Q. scores of 19,000 college students are approximately normally distributed with a u = 125 and o = 14. Using your TI-83/84 calculator, what I.Q. score (to the nearest whole number) cuts off the top 10% of the I.Q. scores? O a. 129 O b. 116 O c. 107 O d. 135 O e. 143 QUESTION 29 An achievement exam was given to a population of 1,000 students. However, a sample of only seven of student scores is listed along with their respective z score and percentile rank in the following table. TEST SCORE 42 57 67 72 77 87 97 z score -1.50 -0.75 -0.25 0 0.25 0.75 1.25 percentile rank 10 25 30 45 50 75 95 Using the table information, the percent of all scores within 1/4 of a standard deviation from the mean. O a. 20 O b. 25 O c. 50 O d. 10 O e. 45 QUESTION 30 A survey asked a randomly selected group of 2500 people living in Nassau County the following question, "Have you received at least Save Click Save and Submit to save and submit. Click Save All Answers to save all answers. ? Q 62 F Sunny