MMMR
What is the mean of the following questions
4,6,8,10
7
A teacher surveys only the students sitting in the front row to find out if the students like math. Is this sample biased or unbiased
Biased. It does not represent all students fairly
What do you call the answer to an addition problem
A. Difference
B. Product
C. Sum
D. Quotient
C. Sum
A bar graph shows the number of apples sold each day
Monday 🍎🍎🍎🍎
Tuesday 🍎🍎🍎
Wednesday 🍎🍎🍎🍎🍎
Thursday 🍎🍎
Friday 🍎🍎🍎🍎🍎
Thursday
2 + 2
4
What is the mode of this data set
3,5,7,3,9,3,5
3
Which of the following is an unbiased method of selecting a sample
A. asking your five best friends their favorite fruit
B. surveying the first ten people who walk into a grocery store
C. Randomly selecting 100 names from the student directory
D. Interviewing everyone in your math class
C. Randomly selecting 100 names from the student directory
Which term refers to the distance around a shape
A. Area
B. Volume
C. Perimeter
D. Radius
C. Perimeter
A pictograph shows the number of books read by students
📘=2
Aiden 📘📘📘📘
Bella 📘📘📘
Carlos 📘📘📘📘📘
how many books did carlos read than bella
Answer
Carlos: 10 books
Bella: 6
difference: 4
2 x 2
4
What is the median if these numbers
3,7,8,10,12
8
A school wants to know students opinions on cafeteria food. Which method would result in the most unbiased sample.
A. Survey only the football team
B. Ask for volunteers to fill out survey
C. Randomly select 50 students from the entire student body
D. Survey students during the lunch period
C. randomly select 50 students from the entire student body
What is the name of a number that can only be divided by 1 and itself
A. Composite number
B. Prime number
C. Rational number
D. Interger
B. Prime number
A pie chart shows the favorite pets of a class:
dogs: 40%
cats: 30%
fish: 20%
other: 10%
if there are 50 students in the class how many chose cats
Answer: 30% of 50 = 15 students
(73485 x 28377)0
0
Find the range and mean of the numbers
15,22,18,25,20
Range =10 mean=20
A town wants to find the average commute time for its residents. They collect data by surveying people at a train station. What type of bias is present, and how does it effect the result
Bias type: selection bias
effect commute times might be overestimated or not representative of those who dont use public transport.
What is the term for a number‘s location on a number line, including its sign
A. Magnitude
B. Absolute value
C. Coordinate
D. Integer
C. Coordinate
A line graph shows a students test scores over 5 tests:
test 1: 70
test 2: 75
test 3: 80
test 4: 78
test 5: 85
between which two tests did the score decrease
Answer: between test 3 and test 4
The graph of the function f(x) = |x-3|+2 is a transformation of the basic absolute value function f(x) = |x|
which of the following correctly describes the transformation
A) shift left 3, up 2
B) shift right 3, up 2
C) shift right 3, down 2
D) shift left 3, down 2
Answer: Shift right 3, up 2
Find all MMMR in the numbers
6,8,7,5,10,8,9
Mean=7.57 median=8 mode=8 range=5
Suppose you are conducting a poll on public opinion about a new city policy. You receive responses from 2000 people. 1000 through a city website, 500 By random phone calls, and 500 through social media ads.
discuss The potential biases in this sample and identify which group likely provides the most unbiased responses.
City website responses: self-selection bias - people with strong opinions are more likely to respond
social media ads: coverage bias - may skew towards younger, more tech-savvy users.
phone calls: random sampling - most unbiased though it may still have nonresponse bias.
conclusion: the random phone calls are most likely to yield am unbiased sample.
Which of the following best describes a rational number
A. A number cannot be written as a fraction
B. A repeating or terminating decimal
C. A number with no decimal part
D. A number that goes on forever without repeating
B. A repeating or terminating decimal
Plot the points A(2,3) B(5,3) C(5,7) and D(2,7)
what shape do these points form, and what is its area
Answer: they form a rectangle
width = 5 - 2 = 3
height = 7 - 3 = 4
area = 3 x 4 = 12
Let G be a finite group of order 35. Which of the following statements are true?
A) G must be cyclic
B) G must be abelian but not cyclic
C) G must be non-abelian
D) G has no subgroups of prime order
Answer: A) G must be cyclic