When utilizing t tests, _______ would be considered an adequate amount of power? a) 65% b) 80%. 
 What type of research design would be expected to yield the highest  amount of power (assuming studies with the same sample size)? a) study  using a z test b) study using repeated-measures design
 Which of the following is TRUE about t distributions? a) for any given  sample size, there are between two and N-1 appropriate t distributions  b) the larger the sample size, the more a t distribution resembles a  normal curve