Styles Editing Q5. A book has 600 pages and 20 chapters with same number of pages of each chapter. To estimate the errors of a whole textbook, a page is randomly selected from the first chapter and errors are counted. Thereafter, every 31" page selected to find errors. The sampling method adopted for this purpose is: a. Systematic b. Cluster c. Stratified d. Simple Random Q6. Following pie chart shows enrollment of foreign students in US colleges in 2004-2005 Middle East Africa Latin America Europe Canada Asia The percentage of students who are not Asians enrolled in US colleges in 2004-2005 was a. More than 75% b. more than that of Asians c. exactly 50% d. Less than 50% Q7. The statistics coy(X, Y) -18, Sx'=4, Sy -9 of two numeric variables X and Y are found in a text book. The true statement (s) for simple coefficient of correlation (r) is a. r