Sample vs Population
Simple Probability
Experimental Probability
Measures of Center/Spread
Box and Whisker Plots
100
A school counselor wants to know the average number of hours 7th graders at Lincoln Middle School spend on homework each night. She surveys every 7th‑grade student at the school. Is this a sample or population?
Population
100
What is the probability of rolling an even number on a six-sided dice (simplify)
1/2
100
Joyce reached into a bag of M&Ms and pulled out candies at random. Here are the results of her experiment. What is the experimental probability you choose a green M&M?
3/10
100
Data: 2, 5, 9, 9, 9, 10, 12, 15, 18, 19
What is the mode?
9
100
What is the median?
6
200
A website reports that the average quiz score for students in a middle school is 82, based on quiz scores from 60 students chosen randomly from each math class. Is this a sample or population?
Sample
200
In a box of beads there are 14 flower beads, 16 lightning bolt beads, 12 rainbow beads, and 8 smiley beads. If I reach into the jar, what is the probability I pull out a rainbow bead (simplify)
6/25
200
Joyce reached into a bag of M&Ms and pulled out candies at random. Here are the results of her experiment. What is the experimental probability you choose a red or blue M&M?
1/2
200
Data: 2, 5, 9, 9, 9, 10, 12, 15, 18, 19
What is the range?
17
200
What is the IQR?
5
300
To find out whether students prefer reading graphic novels or comic books, Ms. Lamkin asked 5 random students from each language arts class. Biased or Unbiased?
Unbiased
300
What is the probability of choosing a marble that is not red?
13/20
300
Teagan asked her city how many pets people own. If she asked 1,000 people, how many would we predict have 2 pets
225 people
300
Data: 2, 5, 9, 9, 9, 10, 12, 15, 18, 19
What is the median?
9.5
300
What percentage of the class needs more than 25 minutes to read the chapter?
50%
400
To find out if students prefer lunch free seating or longer recess, Mrs. Cousin posted a survey on the 7th grade canvas page for students to take if they have time. Biased or Unbiased?
Biased
400
What is the probability you spin this spinner and it lands on blue or yellow?
5/8
400
Tom polled random citizens of the city about their age. The results are below. If he asked 100 citizens how many would we expect to be between 20-30 (round)?
31 people
400
Data: 2, 5, 9, 9, 9, 10, 12, 15, 18, 19
What is the mean?
10.8
400
Which data has the biggest spread of IQR?
Week 2
500
The Seattle Torrent have 3 goalies — Hannah, CJ, and Corrinne— and they want to decide who should start as the goalie for the 1st period of their next game. They agree that the decision should be so that each goalie has an equal chance of starting. Each goalie suggests a different method:
Hannah says they should flip a coin, heads vs tails
CJ says they should spin a spinner with three equal sections
Corrinne says they should randomly pull names from the team roster until they choose one of themselves.
Who's method is the most correct?
CJ
500
A bag contains 4 red cards, 5 blue cards, and 3 green cards. One card is chosen at random; it is green and it is not put back. What is the probability the next card is also green?
2/11
500
Here's data on blood donation. If we were to ask 150 people, how many would have O blood?
54 people
500
Data: 2, 5, 9, 9, 9, 10, 12, 15, 18, 19
What is MAD?
4.16
500
Which data likely has the biggest mean?
Thanksgiving