just barely significantp = 0.043
The difference in these proportions was just barely significant by chi-squared test (p = 0.043), but we note that when using stricter Fano factor inclusion criteria for the dataset (variance-to-mean ratio of single-stimulus responses less than 2 rather than 3, see Materials and methods: ‘Triplet’ definition and inclusion criteria), the reduction in the amount of included data increases this p value to p = 0.054 (see Figure 4—figure supplement 1 ).