a state is divided into regions using zip codes. a random sample of 20 zip code areas is selected. identify the technique. (statistics)

The number of potato chips in a bag is normally distributed with a mean of 71 and a standard deviation of 2. approximately what percent of bags contain between 69 and 73 potato chips? approximately 68% approximately 71% approximately 95% approximately 99.7%

Alogical argument that is presented in graphical form using boxes and arrows is called?

Aball is dropped from a height of 10m above the ground. it bounce to 90% of its previous height on each bounce. what is the approximate height that the ball bounce to the fourth bounce?