how do you do longhand

An education researcher claims that 60% of college students work year-round. In a random sample of 400 college students, 240 say they work year-round. At a= 0.10, is there enough evidence to reject the researcher's claim? Complete parts (a) through (e) below. (a) Identify the claim and state Ho and Ha- Identify the claim in this scenario. Select the correct choice below and fill in the answer box to complete your choice. (Type an integer or a decimal. Do not round.) O A. At least % of college students work year-round. O B. The percentage of college students who work year-round is not % O C. At most % of college students work year-round. OD. % of college students work year-round