The Social Isolation Scale (SIS) is a measure used to assess an individual's tendency to isolate themselves from social situations. Scores on this scale are distributed with a mean of 15.0 and a...

Extracted text: The Social Isolation Scale (SIS) is a measure used to assess an individual's tendency to isolate themselves from social situations. Scores on this scale are distributed with a mean of 15.0 and a standard deviation of 4.5. A researcher is investigating whether people with Social Anxiety Disorder have a mean SIS score greater than the general population. To investigate this the researcher collects a sample of 21 participants with Social Anxiety Disorder and computes their mean SIS score. The results of this sample returned a mean of 15.5 and a standard deviation of 8.4. Let - 0.05. What is the p-value you obtain for this hypothesis test? Give your answer to 3 decimal places.