Fix empty stats models

[rwblair]

fixes #962

[cypress]

---

Test summary

7 • 0 • 0 • 0 • 1

---

Run details

Project	Neuroscout
Status	Passed
Commit	d12aeaa ℹ️
Started	Jul 21, 2021 11:15 PM
Ended	Jul 21, 2021 11:17 PM
Duration	02:00 💡
OS	Linux Ubuntu - 20.04
Browser	Electron 87

View run in Cypress Dashboard ➡️

---

Flakiness

	cypress/integration/analysis_builder.spec.js		1
1	Analysis Builder > analysis builder

---

This comment has been generated by cypress-bot as a result of this project's GitHub integration settings. You can manage this integration in this project's settings in the Cypress Dashboard

[codecov-commenter]

Codecov Report

Merging #965 (a9f87dd) into master (24c8772) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #965   +/-   ##
=======================================
  Coverage   82.69%   82.69%           
=======================================
  Files          63       63           
  Lines        3132     3132           
=======================================
  Hits         2590     2590           
  Misses        542      542           

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 24c8772...a9f87dd. Read the comment docs.

[cypress]

---

Test summary

7 • 0 • 0 • 0 • 1

---

Run details

Project	Neuroscout
Status	Passed
Commit	a9f87dd
Started	Jul 21, 2021 11:15 PM
Ended	Jul 21, 2021 11:17 PM
Duration	01:48 💡
OS	Linux Ubuntu - 20.04
Browser	Electron 87

View run in Cypress Dashboard ➡️

---

Flakiness

	cypress/integration/analysis_builder.spec.js		1
1	Analysis Builder > analysis builder

---

This comment has been generated by cypress-bot as a result of this project's GitHub integration settings. You can manage this integration in this project's settings in the Cypress Dashboard

[adelavega]

Test on production backend to compare against problematic model

[adelavega]

LGTM, tested on prod