Triangle PQR with vertices P(1, 5), Q(6, 7), and R(4, 2) is mapped onto triangle P'Q'R' with
vertices P'(3, 3), Q'(8,-1), and R'(6, -6).
Which vector is used in the translation?
A (2, -8)
© (2,8)
В (-2,8)
0 (-8, 2)

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.