Unit 5 Review: Scatterplots & M.A.D.

Unit 5 Review

Scatterplots & M.A.D.

​Scatterplot Association

• ​3 Types of Association: As one variable ______, the other variable ________.

• ​Linear vs. Non-Linear

• ​Strong vs. Weak

Multiple Choice

What type of association is represented in the following graph?

• Non-Linear

• Positive

• Negative

• No Association

Multiple Choice

What type of association is represented in the following graph?

• Linear

• No Association

• Positive

• Negative

Multiple Choice

Choose the appropriate description for the scatterplot.

• Negative & Linear

• Positive & Non-Linear

• No Association

• Positive & Linear

Multiple Choice

Choose the appropriate description for the scatterplot.

• Positive & Linear

• Negative & Linear

• Non-Linear

• No Association

Multiple Choice

Data concerning the number of absences and exam scores were gathered from 22 students and plotted on the scatterplot. Which conclusion best supports the data plotted in the graph?

• There is a positive linear association between the number of absences and exam scores.

• There is a non-linear association between the number of absences and exam scores.

• There is a negative linear association between the number of absences and exam scores.

• There is no association between the number of absences and exam scores.

Multiple Choice

Which scatterplot demonstrates a linear relationship between x and y?

Multiple Choice

Zeke rides on his hoverboard all over his neighborhood after school. He uses an app on his phone to record how far he is from school in between stops. The scatterplot shows Zeke's distance from school when he stops riding in relation to the time on the hoverboard. 

Which conclusion is best supported by the scatterplot?

• As the number of minutes Zeke rides increases, the distance from school increases.

• There is no relationship between the number of minutes Zeke spends running and the distance from school.

• As the number of minutes Zeke rides increases, the distance from school remains the same.

• As the number of minutes Zeke rides increases, the distance from school decreases.

Multiple Choice

Which ordered pair could be added to the data points graphed to keep a linear relationship?

• (-7, 8)

• (6, -9)

• (2, 8)

• (6, 5)

Multiple Choice

The scatterplot displays the earnings in dollars a carpenter makes by working for the city of Killeen. Based on the information in the scatterplot, which statement is a valid conclusion?

• As the number of days the carpenter works increases, the amount of earnings he makes decreases.

• As the number of days the carpenter works increases, the amount of earnings he makes per hour increases.

• As the number of days the carpenter works decreases, the amount of earnings he makes per hour decreases.

• As the number of days the carpenter works increases, the amount of earnings he makes increases.

​Trendlines & Predictions

• ​Steps to creating a trendline

• ​How to make predictions

• ​Before making a prediction, what should you pay attention to on the graph?

• ​Clusters & Outliers

• ​Common errors: Points that are already plotted vs. Trendline to make prediction

Multiple Choice

If the photographer has 8 years of experience, about how many weddings have they photographed?

• 80 weddings

• 60 weddings

• 40 weddings

• 90 weddings

Multiple Choice

The graph shows the number of chocolate bars the band sold. If the trend continues, how many chocolate bars will be sold in 2 hours?

• 20

• 5

• 12

• 25

Multiple Choice

Food and beverage cost from an event with an $160 budget are displayed in the graph below. Based on the graph, if $120 was the total spent on food and beverages, how many people attended the event?

• 12 people

• 7 people

• 11 people

• 9 people

​Mean Absolute Deviation (M.A.D)

• ​What is Mean Absolute Deviation?

• ​What are the steps to calculate M.A.D.?

• ​What happens if you get negatives when calculating differences?

• ​Remember to check your work!

​

Multiple Choice

What does a small Mean Absolute Deviation mean?

• Data points are spread out from the mean

• Data points are close to the mean

• Data points are very low numbers

• It means the data points are besties

Multiple Choice

Mrs. Naoe has been keeping track of test scores for two different classes and records the class scores in percentages after several months as shown below. Which statement is correct?

1st Period: 79, 75, 76, 77, 78

3rd Period: 70, 78, 77, 79, 77

• 1st Period has a greater mean than 3rd period, 3rd Period has a greater MAD than 1st Period.

• 1st Period has a greater mean and a greater MAD than 3rd Period.

• 3rd Period has a greater mean and a greater MAD than 1st Period.

• 3rd Period has a greater mean than 1st period, 1st Period has a greater MAD than 3rd Period.

Fill in the Blank

Valerie kept track of the number of minutes that she practiced playing her violin for her school's spring concert. What is the mean absolute deviation of the number of minutes she practiced? Round your answer to the nearest tenths place.

Poll

Which topic are you LEAST confident about?

• Scatterplot Association

• Making Predictions from Trendlines

• Mean Absolute Deviation

• I am confident on all topics

Poll

Which topic are you MOST confident about?

• Making Predictions from Trendlines

• Mean Absolute Deviation

• Scatterplot Association

• I am confident on all topics