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QUESTION 12 In a sample of 140 college students, the average time per day spent on social media was 2.45 hours. Assume the population standard deviation is 0.80 hours. a) Calculate the 90% confidence interval for the amount of time spent on social media college students average per day (4 points) b) Based on your observations, you believe college students average 3 hours on social media per day. Does the 90% confidence interval support your belief? Explain your response (3 points). c) What would happen to the confidence interval if you sampled 100 college students instead of 140? (3 points) For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac). BIUS Paragraph Arial 10pt E V A V v E EE X2 X2 + ABC V X O + P 0 WORDS QUESTION 13 3 p Screening for COVID 19 and immediately quarantinin