According to a recent census, 15% of the people in the United States are of Hispanic origin. One county supervisor believes her county has a different proportion of Hispanic people than the nation as a whole. She looks at their most recent survey data, which was a random sample of 490 county residents, and found that 43 of those surveyed are of Hispanic origin. Complete parts (a) through (d) below. a) State the hypotheses. (The proportion of people in the county that are of Hispanic origin is denoted by p.) O A. Ho: p = 0.15 OB. Ho: P