Question 1086243
z-value1=(46-48.1)/6.2=-0.339
z-value2=(43.2-45.7)/7.8=-0.321 Better overall the first year, the z is more negative so further from the mean in terms of lower time.
0.3743 or 37th percentile or 2462 runners.
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25th percentile is z=-0.675
(x-45.7)/7.8=-0.675
x-45.7=-5.265
=40.435 or 40.4 minutes.