Variable	M	SD	1	2	3
Hours of Sleep	50.50	29.01
Hours of Sleep
Hours of Sleep	34.94	6.70	.13
Hours of Sleep			[-.06, .32]
Hours of Sleep
Hours of Sleep	4.76	1.46	.02	-.25*
Hours of Sleep			[-.18, .21]	[-.43, -.06]
Hours of Sleep
Hours of Sleep	1.98	0.14	-.10	-.28**	-.12
Hours of Sleep			[-.29, .10]	[-.45, -.09]	[-.31, .08]
Hours of Sleep
Note:
M and SD are used to represent mean and standard deviation, respectively. Values in square brackets indicate the 95% confidence interval. The confidence interval is a plausible range of population correlations that could have caused the sample correlation.
* indicates p < .05
** indicates p < .01.