A doctoral psychology student conducted research for her thesis about the emotional state of people in response to the COVID-19 pandemic. The student studies a sample of 42 adults who have been assessed using the Kessler Psychological Distress scale (K10). A score less than 20 is an indication of low levels of distress. The results of her analysis are shown below:

Descriptive Statistics 95% Upper Bound N Mean StDev SE Mean for u 42 23.62 11.30 1.74 26.55 I: population mean of K10 Score