All Common Core: 8th Grade Math Resources
Example Questions
Example Question #24 : Basic Statistics
What type of correlation does this data have?
Negative correlation
Linear correlation
No correlation
Positive correlation
Positive correlation
It has a positive correlation because the points all trend upward. In other words, as the independent variable on the x-axis increases, the dependent variable on the y-axis also increases. Therefore, the line of best fit that is drawn through the data represents a positive line as it has a positive slope. This verifies that our data has a positive correlation.
Example Question #1 : Scatter Plots
This scatter plot represents data about snack quality (-axis) vs. price (-axis). Which statements are a correct interpretation of the data?
I. The price of a higher quality snack tends to be higher.
II. Points below the line represent snacks whose price is higher than their quality.
III. Points above the line represent snacks whose quality is higher than their price.
II only
I and II
I only
I and III
I only
I. is a true statement about the scatter plot: as quality increases, price tends to increase.
II. is not true - the points under the line have a relatively low price compared to their quality.
III. is also not true - the points above the line have relatively low quality compared to their price.
Example Question #521 : Grade 8
The scatter plot provided displays a group of students' test scores versus the length of time the students spent studying for a test. Based on plot, are there any outliers in the data?
Yes, point
Yes, point
Yes, point
No
No
To answer this question correctly, we need to recall what "outlier" means. An outlier is a value that is much smaller or larger than the rest of the values in a set of data. Also, a data point that does follow the same pattern as the rest of the set could be described as an outlier. In this case, if we had a student that studied hours, but received a test score of that data point would be considered an outlier because it doesn't follow the same pattern as the rest of the set. However, there are no data points in this set that don't follow the pattern; thus, there are no outliers in this set.
Example Question #522 : Grade 8
The scatter plot provided displays a group of students' test scores versus the length of time the students spent studying for a test. Based on plot, which of the following patterns does the relationship between number of hours spent studying and the corresponding test score represent?
A positive association, a higher number of hours spent studying correlated to a lower test score
The results shown do not show any sort of pattern
A positive association, a higher number of hours spent studying correlated to a higher test score
A negative association, a lower number of hour spent studying correlated to a higher test score
A positive association, a higher number of hours spent studying correlated to a higher test score
In the provided scatter plot, we can pick out data points and organize them from least to greatest, based on hours spent studying:
Based on the results, we can see that as the number of hours spent studying increased, the test grade also increased; thus, a positive association, a higher number of hours spent studying correlated to a higher test score.
Example Question #2 : Statistics & Probability
The scatter plot provided displays a group of students' test scores versus the number of missing assignments the students have. Based on plot, are there any outliers in the data?
No
Yes, point
Yes, point
Yes, point
No
To answer this question correctly, we need to recall what "outlier" means. An outlier is a value that is much smaller or larger than the rest of the values in a set of data. Also, a data point that does follow the same pattern as the rest of the set could be described as an outlier. In this case, if we had a student that had missing assignments, but received a test score of that data point would be considered an outlier because it doesn't follow the same pattern as the rest of the set. However, there are no data points in this set that don't follow the pattern; thus, there are no outliers in this set.
Example Question #3 : Construct And Interpret Scatter Plots: Ccss.Math.Content.8.Sp.A.1
The scatter plot provided displays a group of students' test scores versus the length of time the students spent studying for a test. Based on plot, select the answer choice with the data point that if added to the graph, would be an outlier.
To answer this question correctly, we need to recall what "outlier" means. An outlier is a value that is much smaller or larger than the rest of the values in a set of data. Also, a data point that does not follow the same pattern as the rest of the set could be described as an outlier.
Let's look at our answer choices:
This point is showing that a student who studied for hours received a on the test. If we look at our graph, we can see that the two students that spent hours studying received scores of and . A score of fits in with that data; thus, is not an outlier.
This point is showing that a student who studied for hour received a on the test. If we look at our graph, we can see that the two students that spent hour studying received scores of and . A score of fits in with that data; thus, is not an outlier.
This point is showing that a student who studied for hours received a on the test. If we look at our graph, we can see that the two students that spent hours studying received scores of and . A score of fits in with that data; thus, is not an outlier.
This point is showing that a student who studied for hours received a on the test. If we look at our graph, we can see that the student who spent hours studying received a score of . Also, if we look at the student who studied for hours, that student received an . Based on this results, would be an outlier.
Example Question #521 : Grade 8
The scatter plot provided displays a group of students' test scores versus the number of missing assignments the students have. Based on plot, select the answer choice with the data point that if added to the graph, would be an outlier.
To answer this question correctly, we need to recall what "outlier" means. An outlier is a value that is much smaller or larger than the rest of the values in a set of data. Also, a data point that does not follow the same pattern as the rest of the set could be described as an outlier.
Let's look at our answer choices:
This point is showing that a student had missing assignments received a on the test. If we look at our graph, we can see that the student that had missing assignments received a score of . A score of fits in with that data; thus, is not an outlier.
This point is showing that a student who had missing assignments received an on the test. If we look at our graph, we can see that the student that had missing assignments received score of . A score of fits in with that data; thus, is not an outlier.
This point is showing that a student who had missing assignments received a on the test. If we look at our graph, we can see that the two students that had missing assignments received scores of and . A score of fits in with that data; thus, is not an outlier.
This point is showing that a student who had assignments missing received a on the test. If we look at our graph, we can see that the student who had missing assignments received a score of . Also, if we look at the student who had missing assignments, that student received a . Based on this results, would be an outlier.
Example Question #523 : Grade 8
Select the answer choice with a data set that includes an outlier.
To answer this question correctly, we need to recall what "outlier" means. An outlier is a value that is much smaller or larger than the rest of the values in a set of data. Also, a data point that does not follow the same pattern as the rest of the set could be described as an outlier.
In this case, we are looking for a number that doesn't match with the other numbers provided in a set:
has a much larger value than the other number in the set; thus, is an outlier.
Example Question #12 : Construct And Interpret Scatter Plots: Ccss.Math.Content.8.Sp.A.1
Select the answer choice with a data set that includes an outlier.
To answer this question correctly, we need to recall what "outlier" means. An outlier is a value that is much smaller or larger than the rest of the values in a set of data. Also, a data point that does not follow the same pattern as the rest of the set could be described as an outlier.
In this case, we are looking for a number that doesn't match with the other numbers provided in a set:
has a much larger value than the other number in the set; thus, is an outlier.
Example Question #522 : Grade 8
Select the answer choice with a data set that includes an outlier.
To answer this question correctly, we need to recall what "outlier" means. An outlier is a value that is much smaller or larger than the rest of the values in a set of data. Also, a data point that does not follow the same pattern as the rest of the set could be described as an outlier.
In this case, we are looking for a number that doesn't match with the other numbers provided in a set:
has a much smaller value than the other number in the set; thus, is an outlier.