1) A researcher is studying a data set and notices that it contains a several outliers. In this circumstance, the _____ might be the best representation of central tendency.

a. median

b. mean

c. standard deviation

d. range

2) A sample ofn= 64 scores hasM= 32 ands²= 9. What is the sample standard deviation?

a. 9

b. 4.5

c. 3

d. 81

3) Which of the following is true about random assignment?

a. participant characteristics are more likely to be balanced across conditions if the samples are small

b. it guarantees that confounds will not occur because participants characteristics are balanced across groups

c. participant characteristics are more likely to be balanced across conditions if the samples are large

d. it is a method for selecting participants from the population so that each participant has an equal chance of being selected