A research team conducted a study to investigate the average time spent by university students on social media per day. A random sample of 50 students was selected, and the average time spent on social media was found to be 120 minutes with a standard deviation of 15 minutes. Calculate a 95% confidence interval for the average time spent by university students on social media per day. Interpret the meaning of the confidence interval in the context of the study. If the research team wanted to decrease the margin of error in their confidence interval, what adjustments could they make, and how would these adjustments impact the width of the interval