Blackboard Learn X DO IDEAS X C Blackboard Learn X DO IDEAS | X + - C ideas.humber.ca/assess2/?cid=282&aid=7739#/skip/10 N Update Apps Instagram Maps M Gmail YouTube my lab it business blackboard T textidium BUSS SUMMER BUSS SUMMER M... blackboard tophat Reading List Instruction Delivery Environment & Assessment System Course Message Forums Calendar Gradebook Log Out Home > BSTA200-D8A F21 > Assessment Quiz 9 - Confidence Intervals Progress saved Submit and End & Voce Score: 0/30 0/12 answered . Question 10 C0/2 pts 9 3 0 Details You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard deviation is approximately o = 27.7. You would like to be 99.5% confident that your esimate is within 2.5 of the true population mean. How large of a sample size is required? Do not round mid-calculation. However, use a critical z value accurate to two (2) decimal places. Question Help: @ Video Check AnswerBlackboard Learn X DO IDEAS X C Blackboard Learn X DO IDEAS ( X + C ideas.humber.ca/assess2/?cid=282&aid=7739#/skip/11 N Update Apps Instagram Maps M Gmail YouTube my lab it business blackboard T textidium BUSS SUMMER & BUSS SUMMER M... blackboard tophat Reading List IDEAS H HUMBER Instruction Delivery Environment & Assessment System Course Messages Forums Calendar Gradebook Log Out Home > BSTA200-D8A F21 > Assessment Quiz 9 - Confidence Intervals Progress saved Submit and End & voce Score: 0/30 0/12 answered . Question 11 0/2 pts 9 3 0 Details A study is conducted to estimate the mean completion time of a task to within 2 minutes 48 seconds of the population mean. Suppose completion time is normally distributed with a standard deviation of 9 minutes 51 seconds. What minimum sample size is required at the 82.3% confidence level? You must use a critical z value rounded to two (2) decimal places. Do not round other intermediate results. Report final answer as an integer. Minimum sample size required = Question Help: @ Video Check AnswerBlackboard Learn X DO IDEAS X C Blackboard Learn X DO IDEAS ( X + C ideas.humber.ca/assess2/?cid=282&aid=7739#/skip/12 N Update Apps Instagram Maps M Gmail YouTube my lab it business blackboard T textidium BUSS SUMMER S BUSS SUMMER M... blackboard tophat Reading List IDEAS H HUMBER Instruction Delivery Environment & Assessment System Course Messages Forums Calendar Gradebook Log Out Home > BSTA200-D8A F21 > Assessment Quiz 9 - Confidence Intervals Progress saved Submit and End & Voce Score: 0/30 0/12 answered . Question 12 0/1 pt 9 3 0 Details You have just discovered that a confidence interval you constructed for u is wider than required. Which of the following actions will reduce the width of the confidence interval? Select all that apply O Increasing the sample mean O Reducing the sample size Increasing the sample size O Reducing the confidence level O Reducing the sample mean O Increasing the confidence level Check