An environmental survey contained a question asking what respondents thought was the major cause of air pollution in this country, giving the choices “automobiles,” “factories,” and “incinerators.” Two versions of the test, A and B, were used. Let pA and pB be the respective proportions of people using forms A and B who select “factories.” If 170 out of 460 people who used version A chose “factories” and 141 out of 440 people who used version B chose “factories,”
(a) Find a 95% confidence interval for pA − pB.
(b) Do the versions seem to be consistent concerning this answer? Why or why not?
CHAPTER 8 THE HIMALAYAN REGION THREE THEMES OF THIS REGION 1. The Himalayas and Monsoons 2. Poverty, density disparate levels of economic development. 3. High altitude life. a. Nepal b. Bhutan HIMALAYAS AND MONSOONS 1. Himalayan Mountains are the world’s largest. a. Formed as Indian subcontinent smashes into South Asia. 2. The summer monsoon is a period of rain when the inter-tropical convergence zone intersects geographically with the Himalayas. a. Copious amounts of rain. 3. Monsoon moisture is funneled through the rivers coming from the mountains. a. Indus, Brahmaputra, Ganges b. Severe flooding in low-lying areas PO