A researcheris tryingto discover the averageage at death for peoplein theUnited Statestoday. Toobtaindata, for 30days, and theagesatdeathof peoplein theUnitedStatesarenoted. Doyou think this approach will lead to a representative sample?

Rachel reads 1/5 of the pages of a book plus 12 pages on the first day. on the second day, she reads 1/4 of the remaining pages plus 15 pages. on the third day, she reads 1/3 of the remaining pages plus 18 pages. on the fourth day, she reads the remaining 70 pages. how many total pages are in the book?

The first-serve percentage of a tennis player in a match is normally distributed with a standard deviation of 4.3%. if a sample of 15 random matches of the player is taken, the mean first-serve percentage is found to be 26.4%. what is the margin of error of the sample mean? a. 0.086% b. 0.533% c. 1.11% d. 2.22%

Explain how you can find the missing fraction in 3 4/5 / (blank) 2 5/7. then find the missing fraction.