In retirement plans, what does vesting refer to? A) The need to diversify your investments to avoid major losses in one area.
B) How long you have to work before employer contributions become yours.
C) The ability of your money to grow without having to pay tax on the earnings.
D)Whether the plan is managed by the employer, government or the individual.

Ur environment is very sensitive to the amount of ozone in the upper atmosphere. the level of ozone normally found is 4.04.0 parts/million (ppm). a researcher believes that the current ozone level is not at a normal level. the mean of 2525 samples is 4.44.4 ppm with a standard deviation of 0.80.8. assume the population is normally distributed. a level of significance of 0.020.02 will be used. make the decision to reject or fail to reject the null hypothesis. answer tables