Table 2. Summary of statistical parameters for globin mRNA levels in single cells.

Globin message	Mean	S.D.a	S.E.M.b	Variance	Skew
α-globin (control)	–2.006	0.488	0.072	0.238	0.001 (P = 1.000)
α-globin (hemin)	–1.538	0.532	0.078	0.283	–0.690 (P = 0.041)
γ-globin (control)	–0.058	0.461	0.068	0.213	–0.025 (P = 0.940)
γ-globin (hemin)	0.472	0.322	0.047	0.104	–0.658 (P = 0.052)
ɛ-globin (control)	–0.058	0.461	0.352	0.213	0.005 (P = 0.988)
ɛ-globin (hemin)	0.472	0.322	0.048	0.104	–1.781 (P < 0.001)

^aStandard deviation.

^bStandard error of the mean.