could someone demonstrate how to work the statsical problem

could someone demonstrate how to work the statsical problem please.

d· There are no important observational studies. 11. (Extra Credit) Assume that I want to know about PE issues not just in all males at GCC, but also want to take into account their age and weight. Specifically, I want to know how many younger men at GCC have PE issues and how many older man at GCC have PE issues. I also want to know how many overweight and how many normal weight males have PE issues. I know that of the 12,000 males at GCC, 80% are \"younger\" men and 20% are \"older\" men. I also know that for both of these groups, half are normal weight and half are over- weight, I make a table as shown below to help me determine how many men of each type I need in my small group of 100 in order that this small group really \"represents\" the 12,000 men at GCC. For cach blank cell (there are 8) write a number that indicates how many of that particular type of man I need to randomly select into my small group of 100 Younger men Older men Totals Normal weight men Overweight men Totals 100

Solution

So, half are overweight, and half are normal weight.

So, the totals on the right are both 50.

Now, to 80% are younger, and 20% are older. So, the total of \"Younger Men\" is 80, and the total of \"Older Men\" is 20.

Now, we get 80% of 50, and that\'s 40. That\'s the entry for both cells on the \"Younger Men\" column.

Now, we get 20% of 50, and that\'s 10. That\'s the entry for both cells on the \"Older Men\" column.

Now, consider the table:

	Younger Men	Older Men	Totals
Normal Weight Men	40	10	50
Overweight Men	40	10	50
Totals	80	20	100