12. The double box plot shows the weight in
pounds for the students of two middle
school classes. Find the interquartile range
of each dass and compare their variations.
Class
weight of Students
Classes
70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85

Another type of subtraction equation is 16-b=7. explain how you would sole this equation then solve it.

According to a study conducted in 2015, 18% of shoppers said that they prefer to buy generic instead of name-brand products. suppose that in a recent sample of 1500 shoppers, 315 stated that they prefer to buy generic instead of name-brand products. at a 5% significance level, can you conclude that the proportion of all shoppers who currently prefer to buy generic instead of name-brand products is higher than .18? use both the p-value and the critical-value approaches.

Sawsan recorded the favorite sport of students at her school. she surveyed 200 students. how many students chose tennis?