Random or Biased
Population Inferences
Percents
Expressions & Equations
Integer Operations
100
Chloe surveys only students who wear a UGA sweatshirt who they think should have made the conference games. Explain.
Biased -- only asked UGA fans
100
Mrs. Fouche surveyed students about their favorite color. She surveyed 30 random students in 7th grade.
- 8 said red
- 10 said blue
- the remainder said green
If there are 350 students in 7th grade, how many would you expect to say green?
140 students
100
The elves are preparing for Christmas morning. They typically make 1,200 presents a day. They have to increase 12% to make sure they are done in time. How many presents do they need to make today?
1,344 presents today
100
3(x - 8) = 9
x = 11
100
Harry Potter is trying to defeat "He who must not be named". He is creating a potion that needs
2 1/4
cups of seaweed. If he needs to make 5 recipes of this potion, how much seaweed does he need?
11 1/4 cups of seaweed
200
Mr. Harris wants to know if students would rather have hot chocolate or apple cider. He randomly chooses 15 students in 7th and 15 students in 6th grade.
Random -- he asked students from both grades, and found students randomly.
200
Coach Harrison flipped a coin 60 times. She landed of heads 25 of those times. If she flips the coin 300 times, how many times would you expect her to flip heads?
125 times
200
Ms. Miles has wrapped 25 presents. There are 5 red presents. What percent of her presents are wrapped in red wrapping paper?
20%
200
3(2x - 8) - 2(x - 10)
3(2x - 8) - 2(x - 10)
6x - 24 - 2x + 20
4x - 4
200
Aaron is 20 feet above sea level flying his kite. Iker is 30 feet below sea level looking for sea turtles. How far apart are the friends?
50 feet apart
300
Mrs. Craven wants to know if students would rather watch "The Grinch" or "Polar Express". She asks five students from each of her class by drawing popcicle sticks.
Random -- she asked students from each class by drawing names.
300
Which of the following is true?
A. Team A has a more varied data set.
B. The teams have no data that overlaps.
C. The median for team B is the same as the maximum of team A.
D. In both teams, the IQR is 2.
D -- the IQR is 2 for both teams
300
Mrs. Pittman has 5 favorite drinks at Cherry Street. What is the percent that she would choose "Watermelon Crawl"?
20%
300
Samantha went to the store and bought a pair of shoes for $45. In addition to that, she also bought three t-shirts, each costing x. The total amount she spent was $93. Write the equation & solve.
45 + 3x = 93
$16 per shirt
300
Mickey Mouse is on his helicopter. He is 40 feet above sea level. He descends 100 feet. Where is he now?
60 feet below sea level
400
The lunchroom wants to know if students would rather eat nachos or quesadilla for lunch Tuesday. She surveys the first 10 students to enter the lunch room.
Biased -- she didn't interview anyone from Soar Street or Eagle Avenue. In addition, she could have asked students who bring their lunch daily.
400
Myles has the following test scores:
85, 88, 92, and 97
What does he need to earn on the last test to have a 90 in math class?
88
400
A store is having a sale on smartphones. The original price of a smartphone is $800. During the sale, the price is reduced by 20%. However, after the sale ends, the store applies an additional 10% price increase on the sale price. How much will the TV be after the sale?
$704
400
Katherine is going to see the new Mufassa movie. Her total bill was at least $111.50. She spent $35 on snacks. She also bought 9 tickets. How much did each ticket cost at least?
9x + 35 >= 111.50
x >= $8.50
400
A hiking team starts at 70 feet above sea level. They end up 30 feet below sea level. How far did the travel?
They descended 100 feet.
500
Landon wanted to know what the most popular game on GimKit was. He interviewed his friends that he knows loves "Don't look down".
Biased -- he asked students who he knows love that version of the game and noone else.
500
Ms. Crisp wants to know how many movies students have seen this week. She randomly surveyed students at EJMS. How many students would you expect to watch at least 3 movies this week if there are 600 students a EJMS?
9 / 20 = 270 students
500
A laptop is originally priced at $1,200, but it’s on sale for 25% off. After the discount, you need to pay a 6% sales tax on the sale price. What is the final cost?
$954
500
56 < 34 - x
x < -22
500
The temperature started at 12 degrees. It decreased 2 degrees every hour. Where is the temperature after 18 hours?
-24 degrees