Find the value of -za/2 that corresponds to a level of confidence of 91.28 percent. 1)...

Question:

Find the value of -za/2 that corresponds to a level of confidence of 91.28 percent. 1) -1.71 2) 1.71 3) 0.0436 4) -1.36
Question 12 (6 points) Saved Find the z-score corresponding to the given value and use the z-score to determine whether the value is unusual. Consider a score to be unusual if its z-score is less than -2.00 or greater than 2.00. Round the Z-score to the nearest tenth if necessary. A time for the 100 meter sprint of 15.0 seconds at a school where the mean time for the 100 meter sprint is 17.5 seconds and the standard deviation is 2.1 seconds. 1) -1.2; unusual 2) -2.5; unusual 3) -1.2; not unusual 4) 1.2; not unusual

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