Mean: To find mean you do the same as you would to find an average. Add up all of the numbers and divide by how many numbers are there. So, 8.3 + 4.5 + 6.2 + 9.6 + 4.3 + 11.2 + 5.9 + 9.7 + 10.5 = 70.2 Then divide by 9 since you have 9 numbers. 70.2 / 9 = 7.8
Median: To find median you set up the data from least to greatest and cross out one number from each side until you are left with one number as the middle number. 4.3, 4.5, 5.9, 6.2, 8.3, 9.6, 9.7, 10.5, 11.2 4.5, 5.9, 6.2, 8.3, 9.6, 9.7, 10.5 5.9, 6.2, 8.3, 9.6, 9.7 6.2, 8.3, 9.6 = 8.3 Mode: Mode is the most, meaning the number that appears the most in your set of data. In this case there is no mode because in your set there is no number that occurs more than once.
Well this is a hard question to answer, but this is how i would put it.
You would take a number (lets use 15) and the second number (lets use 5) would determine how many times it would go into 15. In other words, 5 time x would equal 15 (5x=15). 5, being a factor of 15, would evenly fit into 15 three times.
Because it's decreasing, you use the formula (1-x/100)y with x the percentage decreased which is here 40, and y the number decreased which is here 90 So we get (1-40/100) * 90 (100/100 - 40/100) * 90 60/100 * 90 5400/100 54 So 90 decreased by 40% is 54 Hope this Helps :)
