A group of statistics students decided to conduct a survey at their university to estimate the average (mean) amount of time students spent studying per week. They sampled 554 students and found a mean of 22.3 hours per week. Assuming a population standard deviation of six hours, what is the confidence interval at the 95% level of confidence? (Please use Student'st distribution (Appendix B.5) at infinite degrees of freedom for three decimal accuracy of the required z value.) Multiple Choice 21.80 and 22.80 16.3 and 28.3 21.64 and 22.96 20.22 and 220 Next of 10 Prev ME Graw 419 AM 11/17/2019 O Type here to search M12

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