Review Problems For Second Test

# Review Problems For Second Test - Review Problems For...

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Review Problems For Second Test 1. What z-score separates the top 25% of normal distribution scores from the bottom 75%? (+.68) 2. What z scores form the boundaries of the middle 50% of normal distribution scores? (+.68 and -.68) 3. What z scores form the boundaries of the 68 th and 98 th percentiles? (+.47 and +2.06). 4. A normal distribution of scores has a mean of 60 and a standard deviation of 6. What scores form the boundaries of middle 68% of this distribution? (54 and 66) 5. A physical fitness association is including the mile run in the secondary fitness test for students. The time for this event for secondary school students is approximately normally distributed with a mean of 450 seconds and a standard deviation of 40 seconds. What time would the association set that would represent the fastest 10% of running times? (398.8 seconds) 6. American league batting averages average 268 with a standard deviation of 31. National league averages are 262 with a standard deviation of 39. What is the probability of an American league player batting 300 or higher? (.15). What is the probability of a National league player

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## This note was uploaded on 03/29/2012 for the course BIO 359K taught by Professor Mcclelland during the Spring '08 term at University of Texas at Austin.

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Review Problems For Second Test - Review Problems For...

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