The following data represent the age (in weeks) at which babies first crawl based on a survey of 12 mothers. 52 30 44 35 47 37 56 26 39 39 35 47 decide whether applying the t-interval procedure to obtain a confidence interval for the population mean in question appears reasonable. explain your answer.

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?