Fixed confidence interval test again #451

Job	Run time
Documentation	1m 19s
Julia 1.8 - ubuntu-latest - x64 - push	5m 6s
Julia 1.8 - macOS-latest - x64 - push	8m 30s
Julia 1.8 - windows-latest - x64 - push	6m 14s
Julia 1.9 - ubuntu-latest - x64 - push	2m 4s
Julia 1.9 - macOS-latest - x64 - push	13m 36s
Julia 1.9 - windows-latest - x64 - push	6m 59s
Julia 1.10 - ubuntu-latest - x64 - push	5m 6s
Julia 1.10 - macOS-latest - x64 - push	8m 58s
Julia 1.10 - windows-latest - x64 - push	6m 39s
Julia nightly - ubuntu-latest - x64 - push	3m 59s
Julia nightly - macOS-latest - x64 - push	15m 47s
Julia nightly - windows-latest - x64 - push	5m 27s
	1h 29m 44s

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