A random sample of 90 eighth grade students' scores on a national mathematics assessment test has a mean score of 284. This test result prompts a state school administrator to declare that the mean score for the state's eighth graders on this exam is more than 280. Assume that the population standard deviation is 39. At a = 0.02, is there enough evidence to support the administrator's claim? Complete parts (a) through (e). A. Ho: HS 280 O B. H: H= 280 O C. . Ho: H= 280 (claim) Ha: H > 280 (claim) H2: [ > 280 (claim) H: HI > 280 O D. Ho: HIS 280 (claim) OE. H: H 2 280 (claim) OF. Ho: H 280 H2: H