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At least 25 sec? Between 10 sec and 25 sec? 5 b) Does a location time of 1 sec qualify as one of the fastest 5% of all times? since 1 < 1.026, yes
Note: we want the 5th percentile, not the 95th percentile because we are going from lower to
(1.2 pts.) 1.34 (p.41). Determine the following percentiles for the standard normal
Note: No work is required for this part.
z = 1.34 has a value of 0.9099, z = 1.35 has a value of 0.9155, answer: 1.34
z = -1.34 has a value of 0.0901, z = -1.35 has a value of 0.0885; answer -1.34
since the standard normal curve is symmetrical around 0, the proportion to the right of 1.34 is
100th – 91st = 9th percentile is the same as the amount to the left of -1.34 (9th percentile).
z = -0.77 has a value of 0.2206, z = -0.78 has a value of 0.2177; answer -0.77
z = 3.08, 3.09, 3.10...
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- Fall '08