A study reports that 26% of 4-year college graduates nationwide who majored in biology obtain a job related to biology within 1 year of graduation. Fifteen 4-year colleges in one state compare their placement rates for biology graduates with the national average at 1 year post graduation. Their rates are 41%, 23%, 19%, 61%, 22%, 28%, 18%, 29%, 33%, 23%, 35%, 37%, 26%, 38%, and 21%.
a. State the non directional hypothesis.
b. Determine the critical t for a = .05.
c. Calculate t Show your work.
d. Is the placement rate for biology graduates in these 15 schools significantly different from the national placement rate?