[Hulk01]

The published stats treat sacks as failed runs, not failed passes.
Treat sacks as attempted passes, and you get these 2018 stats:

Stanford first down rushing
69 runs, 312 yards, 4.5 ypa

Stanford first down passing
34-57 (59%), 460 yards, 8.1 ypa

30% of our first down passes have gone for no yards.
An additional 11% have gone for an average of 7.3 yards per play in losses.

14-16% of our first down runs have gone for gain or a loss.

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Another way to look at the relatively high beta of our first down passing so far:

59% of our first down pass attempts have resulted in an average 13.4 yard gain.
41% of those attempts have resulted in an average 1.9 yard loss.

[Hulk01]

The published stats treat sacks as failed runs, not failed passes.
Treat sacks as attempted passes, and you get these 2018 stats:

Stanford first down rushing
69 runs, 312 yards, 4.5 ypa

Stanford first down passing
34-57 (59%), 460 yards, 8.1 ypa

30% of our first down passes have gone for no yards.
An additional 11% have gone for an average of 7.3 yards per play in losses.

14-16% of our first down runs have gone for gain or a loss.

---

Another way to look at the relatively high beta of our first down passing so far:

59% of our first down pass attempts have resulted in an average 13.4 yard gain.
41% of those attempts have resulted in an average 1.9 yard loss.