Embry Riddle wants to know more about the knowledge of their

Embry Riddle wants to know more about the knowledge of their Graduate students regarding
international Aviation law. They are concerned that their students are uninformed in regards to
international law from other countries. A standardized test is used to assess the students
knowledge (national reported mean=65, sd=5). A sample of 30 students are tested (sample
mean=58, standard error=3.2). Compute a 99 percent confidence interval based on this
sample\'s data. How do these students compare to the national sample?

Solution

99 percent confidence interval based on this sample\'s data.

58-z(0.995)*3.2, 58+z(0.995)*3.2

z(0.995)=2.58

so confidence interval is given as (49.744 , 66.256)

as this sample include national average 65 we can say that students are not uninformed in regards to international law from other countries