1. On the basis of her experience with clients, a clinical psychologist thinks that depression may affect sleep. She decides to test this idea. The sleep of nine depressed patients and eight normal...

Psychological Statistics - Testing Hypothesis about Means - T-test

Extracted text: 1. On the basis of her experience with clients, a clinical psychologist thinks that depression may affect sleep. She decides to test this idea. The sleep of nine depressed patients and eight normal controls is monitored for three consecutive nights. The average number of hours slept by each subject during the last two nights is shown in the following table: (Pagano, 2010). If proved significant, compute of the effect size. Hours of Sleep Depressed patients 7.1 Normal controls 8.2 6.8 7.5 6.7 7.3 7.7 7.8 7.5 8.0 6.2 7.4 6.9 7.3 6.5 6.5 7.2