How long does it take to fall asleep at night? This depends on what happened the night before. A random sample of 38 college students was kept awake all night and the next day (24 hours).
The mean time for this group to go to sleep the next night was 2.5 minutes with standard
deviation of 0.7 minutes. Compute and interpret a 95% confidence interval for the mean time
of all such students to fall asleep.

Identify a1 and r for the geometric sequence an= -256(-1/4) n-1

Daniel expanded the expression as shown below -2(-8x-4y+3/4)=-10x-8y-11/4 what errors did he make? check all that apply

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?