In illinois a random sample of 85 eighth grade students have a mean score of 265 with standard deviation of 55 on the national mathematics assessment test. Result prompts are school administration to decide the mean score for the states eith graders on the examination is more than 260. At alpha equals 0.04 is there enough evidence to support the clim?
Whats the claim mathematically and identify Ho and Ha.
Find sd test stat 2 and its corresponding area
Find the p-value
Decide wether to reject or fail to reject Ho
Interpret decision in the contest of the original claim.