33. Registered voters In a congressional district, 55% of pg.490. registered voters are Democrats. A polling organization
selects a random sample of 500 registered voters from
this district. Let h = the proportion of Democrats in
the sample.

identify the mean
calculate and interpret the standard deletion of the sample distribution of p hat verify that 10% condition is met

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?