Question 2 of 40 James is given the diagram below and asked to prove that 2D a ZF. What would be the missing step of the proof? Given: DE FE, and Eo forms the angle bisector of 2 DEF. Prove: 2D LF E D

Arandom sample of n = 25 observations is taken from a n(µ, σ ) population. a 95% confidence interval for µ was calculated to be (42.16, 57.84). the researcher feels that this interval is too wide. you want to reduce the interval to a width at most 12 units. a) for a confidence level of 95%, calculate the smallest sample size needed. b) for a sample size fixed at n = 25, calculate the largest confidence level 100(1 − α)% needed.