Statistic Review

What was the most popular party type?

• Bowling

• Skating

• Dancing

• Total

Answer explanation

The most popular party type was Skating.

How many chemical engineers chose Science as their favorite subject?

• 80

• 91

• 171

• 262

Answer explanation

Out of the given answer choices, 91 chemical engineers chose Science as their favorite subject.

What is the type of correlation for the following scatter plot?

• Negative 

• None

• Positive 

Answer explanation

The scatter plot shows no clear pattern or relationship between the variables, indicating a correlation of None.

The scatter plot shows the relationship between the number of chapters and the total number of pages for several books. Use the trend line to predict how many pages would be in a book with 6 chapters. 

• ≅100 pages

• ≅170 pages

• ≅60 pages

• ≅20 pages

Answer explanation

The trend line suggests that a book with 6 chapters would have approximately 60 pages.

About how many male math teachers will there be in 2016?

• 35

• 46

• 52

• 70

Answer explanation

In 2016, there will be 52 male math teachers, as indicated by the correct answer choice.

What percentage of the students were boys?

• 20%

• 25%

• 40%

• 50%

Answer explanation

The correct answer is 50%. This is because the question asks for the percentage of boys, and 50% represents half of the total students.

What is the equation of the line of best fit?

• y= 6x + 2

• y = -2x +6

Answer explanation

The equation of the line of best fit is y = -1/2x + 6. This equation represents the line that best fits the given data points.

Which sentence describes the relationship shown on this scatter plot?

• As the temperature decreases, the visitors increase.

• As the temperature increases, the number of visitors increases.

• As the visitors increase, the temperature decreases.

• No correlation

Answer explanation

The scatter plot shows that as the temperature increases, the number of visitors also increases. This indicates a positive correlation between temperature and visitors.

Which scatter plot shows a linear relationship between x and y?

• Graph A

• Graph B

• Graph C

• Graph D

Answer explanation

Graph C shows a linear relationship between x and y.

Mrs. Wendel made a scatte rplot to show the relationship between the number of absences and a student’s final exam score. Based on this scatte rplot, a student with 6 absences should get approximately what score on the final exam? 

• 65

• 92

• 70

• 76

Answer explanation

Based on the scatterplot, a student with 6 absences should get a score of approximately 76 on the final exam. This is the correct choice.