Question 925703
Sample mean = 2.4,  SD = 2
SE = 2/sqrt(400)
ME = 2.576 (.1) = .2576
CI: 2.4 - .26 < u  < 2.4 + .26
CI: (2.14, 2.66)
CI: (2.1, 2.7)
Use the Number of Decimals Points as Directed for Class Use.