Statistics Data Analysis

Data sets A and B are graphed on the coordinate grid. Which statement about the lines of best fit for the two data sets is most likely true?

• The lines of best fit for data sets A and B are the same line.

• The y-intercepts and the slopes of the lines of best fit for the data sets A and B both differ by 4.

• The y-intercepts of the lines of best fit for the data sets A and B differ by 4, but the slopes are the same.

• The slope of the line of best fit for data set A is 4, and the slope of the line of best fit for data set B is 1/4.

The height (y) of the tallest building in Pittsburgh in year x is shown in the scatter plot. Based on the scatter plot, which statement is true?

• The data show no correlation.

• The data show a positive correlation.

• The data show a negative correlation.

• There are not enough data points to determine correlation.

9) Brianna observed the orders of customers at a breakfast shop, and whether they ordered toast or a muffin with butter or jelly. The two-way table below displays the relative frequencies of the data. Based on the relative frequencies of the table, which two-way table is a possible representation of the data collected?

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10) Mrs. Caldwell determined the number of students that participated in a school-sponsored program either before school or after school.

Based on the data collected, she concluded that the majority of middle school students in the program participated after school.

Which two-way table is a possible representation of the data she collected?

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The scatter plot shows how many points Denise scored in a game based on the number of hours she practiced. Using a line of best fit, how many points should Denise expect to score after she practices 3 hours?

• 7

• 10

• 12

• 16

The table shows the numbers of grade 7 and grade 8 students who chose cheese pizza or pepperoni pizza as their favorite pizza. Which approximation is closest to the percent of the students who chose pepperoni pizza as their favorite?

• 47%

• 50%

• 53%

• 87%

21) Which of the following shows the line of best fit for the data on the graphs?

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What is the MEDIAN of this data?

• 90

• 20

• 80 and 90

• None

The value appearing at the center of a sorted version of a list, or the mean of the two central values.

• Median 

• Range

• Mean

• Mode

The distance between the greatest number and the least number in a set of data.

• Mean 

• Median

• Range

• Mode