1. A systematic sample of 250 guests is asked how much money they spent on

concessions inside Tigerland Amusement Park. The mean amount of morey is

calculated for the sample Identify/describe the population, sample, sample

statistic and population parameter

2. Mr. Baker keeps track of how long he exercises each day: {62, 43, 44, 0, 53,

49,0). Find and interpret the mean absolute deviation. You must show all

your work, (7 pts)

3. Find and interpret the standard deviation for the data set in #2. You must

show all your work (6 pts)

The first step is to write, $11.50x+$7.50y=$110. Since, y=12-x (Because you bought 12 disks and your subtracting the amount of disks that cost $11.50, you would have to substitute it in) Substitute y in $11.50x+$7.50y=110, so now the problem would be $11.50x+7.50(12-x)=$110, then use the distributive property so you would get $11.50x+90-7.50x=$110. After that, you would combine the like terms, subtract 7.50x from 11.50x and you get 4x. Now you have 4x+90=$110, so subtract 90 on both sides, and the equation is now 4x=20, so divide both sides by 4, and you get x=5(number of $11.50 disks.) Now, to find y you can just substitute the x in y=12-x, so it becomes y=12-5 and so y is equal to 7(amount of $7.50 disks). So, you bought 5 $11.50 compact disks and 7 $7.50 Compact disks.