Skip to main content
. 2016 Nov 29;3(4):e51. doi: 10.2196/mental.6361

Table 3.

t tests examining differences in average daily mood ratings across sleep groups and sense of connectedness groups.

Variable Mean (SD) Mean (SD) t P a
Sleep Insufficient sleep
(<8 hours)
Sufficient sleep (≥8 hours)


Happy 5.91 (1.77) 6.92 (1.79) –3.43b .001

Sad 3.22 (2.15) 2.16 (2.06) 3.06b .003

Angry 2.73 (2.07) 1.99 (1.83) 2.29b .02

Stressed 4.19 (2.22) 3.51 (2.70) 1.65 .10

Worried 3.78 (2.31) 2.90 (2.24) 2.36b .02
Sense of connectedness
Some or none of the time A lot or all of the time


Happy 5.96 (1.83) 6.82 (1.75) –2.92b .004

Sad 3.39 (2.27) 2.00 (1.79) 4.13c <.001

Angry 3.03 (2.17) 1.69 (1.49) 4.46c <.001

Stressed 4.48 (2.35) 3.21 (2.43) 3.24b .001

Worried 4.13 (2.45) 2.54 (1.82) 4.57c <.001

aAlpha set at .028 in line with rough false discovery rate.

bSignificant at the P<.028 level.

cSignificant at the P<.001 level.