For a binomial distribution with n = 100, which of the following has the largest standard deviation?

Harvard professor Robert Yerkes set out to compare how different animals might learn. What level of support did he receive from his university?

a. His department chair and the incoming university president substantially supported his research with funding, equipment, and laboratory space. b. His department chair and the incoming university president supported his research in words but not actions; there was no funding, equipment, or laboratory space. c. Neither his department chair nor the incoming president favored animal research and warned him that his career would not advance. d. Neither his department chair nor the incoming president was familiar with animal research but they were open to learning more about its possibilities.

Which of the following factors influence how well a person acquires a second language in childhood?

A. the intrinsic abilities of the child B. the community's social attitudes about the second language C. the age of acquisition D. all of these are factors which influence how well a person acquires a second language in childhood