YouTube FAB Defense FAB US FAB Box () Odoo Off | nemo burn STAT 211 Statistics With Aviation Appl - Mar 2022 - Online Yitav Kompel 05/02/22 7:54 AM @ Homework: M7-Ch11 Hw Question 8, 11.5.14-T HW Score: 92%, 9.2 of 10 points Save Part 1 ol 3 Points: 0.2 of 1 A random sample of 20 purchases showed the amounts In the table (in $). The mean is $50.26 and the standard deviation is 520.17 40 18 9.98 36 330 a) Construct a 80% confidence interval for the mean purchases of all customers, assuming that the assumptions and conditions for the confidence Interval have been met 60 34 29.57 56.94 b) How large is the margin of error? 61 29 51 12 57.63 c) How would the confidence interval change if you had assumed that the population standard deviation was known to be $21? 42 19 51 72 39.23 64 92 31 84 79.46 84 09 34 19 89.81 28 59 55.87 a) What is the confidence interval? (Round to two decimal places as needed) Help me solve this View an example Get more help - Clear all Check an