Unit 10 Test Review: Data Analysis

Which best describes the strength of the model?

• a weak positive correlation

• a strong positive correlation

• a weak negative correlation

• a strong negative correlation

Tags

CCSS.8.SP.A.2

The scatterplot shows the number of minutes Tyler played in his last eight basketball games and the points he scored in each game. Estimate the location of the line of best fit. About how many points would Tyler score if he played for 40 minutes?

• 18 points

• 22 points

• 27 points

• 40 points

The scatterplot shows the number of minutes spent reading (x) and the number of pages read (y) by each of seven students last night. Use the labeled points to create a linear model that predicts the number of pages that a typical student reads in x minutes. Which equation represents this linear model?

• $y\ =\ \frac{7}{11}x\ +\ \frac{29}{11}$

• $y\ =\ \frac{7}{11}x\ +\ \frac{169}{11}$

• $y\ =\ \frac{11}{7}x\ -\ \frac{263}{7}$

• $y\ =\ \frac{11}{7}x\ -\ \frac{43}{11}$

The graph represents a distribution of data.

What is the mean of the data?

• 5

• 10

• 30

• 50

Tags

CCSS.6.SP.B.5C

Which is most likely the correlation coefficient for the set of data shown?

• -0.83

• -0.21

• 0.21

• 0.83

Tags

CCSS.HSS.ID.C.8

For which scatterplot is the correlation strongest?

• 
• 
• 
• 

Tags

CCSS.HSS.ID.B.5

The table shows the average number of hours of daylight per day for the last four months of the year.

What is the correlation coefficient for the data in the table?

• –0.993

• –0.791

• 0.791

• 0.993

Tags

CCSS.HSS.ID.C.8

The graph shows the relationship between the price of frozen yogurt and the number of ounces of frozen yogurt sold at different stores and restaurants.

According to the line of best fit, about how many ounces of frozen yogurt can someone purchase for $5?

• 1.5

• 2

• 13

• 15.5

Mark and Jessica are each making a linear model to predict the population of squirrels in the town park. They are both using the same data points to find an equation of the line of best fit: the squirrel population, p, in 2002 and the squirrel population, q, in 2011. Mark is using the year as the x-value, and he represents his data as (2002, p) and (2011, q). Jessica is using the years since 2000 as her x-value, and she represents her data as (2, p) and (11, q). Which statement best describes how their prediction equations compare?

• Their equations have the same slopes and y-intercepts.

• Their equations have different slopes and y-intercepts.

• Their equations have different y-intercepts but the same slopes.

• Their equations have the same y-intercepts but different slopes.

Tags

CCSS.8.F.A.2

CCSS.HSF.IF.C.9

Which best describes the strength of the model with an r-value of –0.93?

• a weak positive correlation

• a strong positive correlation

• a weak negative correlation

• a strong negative correlation

Tags

CCSS.HSS.ID.B.5