1) Let Sean=x and Tyrone=y. But we want to get what Sean earns and
what Tyrone earns in terms of one variable so we say that Tyrone=x-4.5
(beacuse he makes $4.50 per hour less than Sean).
2) Now set up the equation: 8 hours time x plus 8 hours times x-4.5 equals 284 OR
8x+8(x-4.5)=284
3) Solve for x
8x+8(x-4.5)=284
8x+8x-36=284
16x=320
x=20
So Sean makes $20 per hour and Tyrone makes $15.50 per hour
If you use a large enough statistical sample size, you can apply the Central Limit Theorem (CLT) to a sample proportion for categorical data to find its sampling distribution. The population proportion, p, is the proportion of individuals in the population who have a certain characteristic of interest (for example, the proportion of all Americans who are registered voters, or the proportion of all teenagers who own cellphones). The sample proportion, denoted
