Using software. In given Example we calculated the 95% confidence interval for the U.S. college student average number of hours spent per month watching videos on a mobile phone. Use software to compute this interval and verify that you obtain the same interval.
Example
90% versus 95% confidence interval. For the previous problem, if you were to use 90% confidence, rather than 95% confidence, would the margin of error be larger or smaller? Explain your answer.