Data & Statistics
Add all of the data together and then divide by the number of data points.
How to find the Mean
Ari works at an ice cream shop that pays 15 dollars an hour. She's trying to earn a total of 75 dollars. Write an equation to represent how many hours (X) she needs to work.
15X=75
A way to represent data using a box and the interquartile range. Hint: Also called a cat and whisker plot
Box plot
X+3=7
X=4
What country did Halloween originate in?
Ireland
Line up all the data points in order from least to greatest then find the exact middle number.
Janay has 5 more dollars than Rephayah and in total they both have 20 dollars. Write an equation where X equals the amount of money Rephayah has.
20=X+(X+5)
Way to represent data with bars of different sizes
Histogram plot
3X+2=8
X=2
What's the most popular Halloween candy?
Reeses peanut butter cups
Find the median 8,8,9,6,5,4,3
6
Alex buys a car for 15,000 dollars with 6% interest per month. Write an equation where X is the number of months and Y is the total cost.
Y=15,000+(15,000*0.06)X
A letter used to represent an unknown value in an equation.
A variable
5X-4=11
X=3
What horror movie has a masked killer named "Ghostface"?
Scream
Find the mean: 2,2,4,4,6,9
4.5
Quinn reads 50 words per minute, which is two times faster than Adam. Write an equation to represent this where X is the amount of minutes.
50X=(50X)/2
Any number that is not a variable in an equation
Coefficient
(x-2)/4=2
X=10
What is the most popular Halloween costume?
Dracula (or vampire)
Subtract the mean from each data point then square each answer. Add each of those numbers together then divide by the number of data points minus one. Finally, take the square root.
How to find the standard deviation
Aniya scored 5 more points than Kira scored at the latest basketball game. All together they both scored a total of 55 points.
55=X+(X-5)
The range that contains 50% of your data. Often found by subtracting Q1 from Q3.
Interquartile Range
5(3X+2)=25
X=1
Which popular Halloween party game used to be used as a romantic match maker?
Bobbing for apples