Ateacher was interested in knowing the amount of physical activity that his students were engaged in daily. he randomly sampled six students in his class and recorded the number of minutes that they exercised in the past day. the numbers were 30mins, 40 mins, 60 mins, 80 mins, 20 mins, and 85 mins. what’s the standard error of the mean

Data from 2005 for various age groups show that for each $100 increase in the median weekly income for whites, the median weekly income of blacks increases by $105. also, for workers of ages 25 to 54 the median weekly income for whites was $676 and for blacks was $527. (a) let w represent the median weekly income for whites and b the median weekly income for blacks, and write the equation of the line that gives b as a linear function of w. b = (b) when the median weekly income for whites is $760, what does the equation in (a) predict for the median weekly income for blacks?