Podcast
Questions and Answers
Which sampling method would likely produce the most representative sample of the school's students?
Which sampling method would likely produce the most representative sample of the school's students?
- Give every student a number and select 20 numbers from a box without looking. (correct)
- Choose the 20 students who volunteer for the school fundraising event this Friday.
- Choose the first 20 students from an alphabetized school roster.
- Choose the first 20 students to arrive in the library in the morning.
Which scatterplot represents a non-linear, positive relationship between x and y?
Which scatterplot represents a non-linear, positive relationship between x and y?
- Scatterplot 3
- Scatterplot 1 (correct)
- Scatterplot 2
- Scatterplot 4
Based on the trend in the scatterplot showing reading times, which prediction is the most reasonable for the time it would take to read a 90-page report?
Based on the trend in the scatterplot showing reading times, which prediction is the most reasonable for the time it would take to read a 90-page report?
- 155 min
- 95 min
- 105 min
- 125 min (correct)
The mean absolute deviation (MAD) represents the average distance each data point is from the _____.
The mean absolute deviation (MAD) represents the average distance each data point is from the _____.
Which scatterplot suggests a linear relationship between x and y?
Which scatterplot suggests a linear relationship between x and y?
What is the best interpretation of the scatterplot showing the number of practice shots taken and the number of free throws missed?
What is the best interpretation of the scatterplot showing the number of practice shots taken and the number of free throws missed?
If the basketball team took 50 practice shots in one practice, what is the best prediction for how many free throws they would miss in their next game?
If the basketball team took 50 practice shots in one practice, what is the best prediction for how many free throws they would miss in their next game?
Based on the scatterplot in question 7, what type of relationship exists between the number of guests and the number of cookies eaten at an event?
Based on the scatterplot in question 7, what type of relationship exists between the number of guests and the number of cookies eaten at an event?
What is the mean of the number of fish in the tanks at the zoo, as shown in question 8?
What is the mean of the number of fish in the tanks at the zoo, as shown in question 8?
In question 9, what is the relationship between the number of games won and the hours practiced?
In question 9, what is the relationship between the number of games won and the hours practiced?
Which of the following statements is true about the scatterplots in question 10?
Which of the following statements is true about the scatterplots in question 10?
In question 11, if Samantha's name is 7 letters long, how much does the engraving cost?
In question 11, if Samantha's name is 7 letters long, how much does the engraving cost?
What is the slope of the line in question 12 where the points (24, -20) and (-32, 1) lie?
What is the slope of the line in question 12 where the points (24, -20) and (-32, 1) lie?
In question 12, what is the y-intercept of the line where the points (24, -20) and (-32, 1) lie?
In question 12, what is the y-intercept of the line where the points (24, -20) and (-32, 1) lie?
What is the equation of the line passing through the points (24, -20) and (-32, 1) in question 12?
What is the equation of the line passing through the points (24, -20) and (-32, 1) in question 12?
Flashcards
Random Sample
Random Sample
A subset of individuals chosen randomly from a larger population.
Linear Relationship
Linear Relationship
A straight-line relationship between two variables.
Mean Absolute Deviation
Mean Absolute Deviation
The average distance of each data point from the mean.
Positive Relationship
Positive Relationship
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Negative Relationship
Negative Relationship
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Non-linear Relationship
Non-linear Relationship
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Scatterplot
Scatterplot
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Prediction from Data
Prediction from Data
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Equation of a line
Equation of a line
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One-time fee
One-time fee
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Engraving cost
Engraving cost
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Study Notes
8th Grade Math CBA 5 (24-25)
- Mrs. Williams wants a sample of 20 students from the school.
- A random sample is obtained by giving every student a number and selecting 20 numbers from a box without looking.
Scatterplots
- Analyze scatterplots to determine if the relationship is linear, non-linear, or neither.
- If linear, determine if it is positive, negative, or neither.
Report Reading Times
- A scatterplot shows the relationship between the time spent reading and the number of pages in a report.
- The question asks for the best prediction for reading time for a 90-page report.
Mean Absolute Deviation
- Given data of 8 great grandchildren's weights: 45, 52, 31, 27, 38, 60, 44, 55
- Calculate the mean absolute deviation.
Scatterplots and Linear Relationships
- Identify which scatterplot does NOT represent a linear relationship.
Practice Shots and Missed Free Throws
- A scatterplot displays the relationship between practice shots taken and missed free throws in a basketball game..
- The data show that an increase in practice shots is associated with a decrease in missed free throws.
- This trend shows a negative linear association.
Cookies Eaten at Events
- A scatterplot shows the relationship between the number of guests and the number of cookies eaten.
- Approximate the number of cookies eaten at an event with 45 guests.
Number of Fish per Tank
- Calculate the mean absolute deviation of the number of fish in each tank.
Baseball Games Won vs. Hours of Practice
- A scatterplot displays the relationship between hours of practice and games won by a baseball team.
- The relationship is positive.
- Determine the number of games won. if the team practices 3 hours a week.
Non-linear Relationships
- Identify the scatterplot that depicts a non-linear relationship between x and y values.
Silver Touch Engraving
- One-time fee of $4.99 to set up an account.
- $2.50 per letter for engraving.
- Calculate the total cost for engraving a name on a picture frame.
Equation of a Line
- Find the equation of the line given two points.
Function in a Table
- A table shows y as a function of x.
- Identify ordered pairs that do not belong to the function.
Mapping Diagrams
- Determine which mapping diagram does NOT represent y as a function of x.
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