math help
posted by Tommy7 .
Please help me on these I have lost the tables that I would need to answer them or at least the ones I think are used.
Consider the following. (Give your answers correct to four decimal places.)
(a) Determine the level of confidence given the confidence coefficient z(á/2) for z(á/2) = 1.65.
Incorrect: Your answer is incorrect. .
(b) Determine the level of confidence given the confidence coefficient z(á/2) for z(á/2) = 1.93. .
(c) Determine the level of confidence given the confidence coefficient z(á/2) for z(á/2) = 2.17.
(d) Determine the level of confidence given the confidence coefficient z(á/2) for z(á/2) = 2.41.

Never mind with the help, I tried for a week and no one would help, just skipped my questions. But thanks