You take an SRS of 9 SAT scores from first- year students from a university with standard deviation 150 and get a sample mean of 1110. find and interpret an 80% confidence interval for the mean SAT score.

If the slope of one line equals the slope of another line then ? a) the two lines are intersecting lines b) the two lines are perpendicular lines c) the two lines are parallel lines d) the two lines always have very steep slopes

Which recursive formula can be used to determine the total amount of money earned in any year based on the amount earned in the previous year? f(n+1)=f(n)+5

Which inequality comparing two of the expressions is true when 0.7 < x < 0.9