Scatterplots and Two Way Tables Review

A survey explored the relationship between gender and band class. Which is a reasonable conclusion?

• There are more band members than non-band members

• There are more boys in the class than girls

• There are more boys in band than not in band

• More than half of the bands members in the class are girls

How do you calculate the marginal relative frequency for females?

• The answer is 180

• 180 ÷ 240

• 135 ÷ 180

• 45 ÷ 135

Q1. What is the trend observed in the data?

• A) positive trend

• B) negative trend

• C) no trend

A scatterplot shows the relationship between hours studied and test scores. If the scatterplot shows a positive trend, what does this indicate?

• As hours studied increase, test scores decrease.

• As hours studied increase, test scores increase.

• There is no relationship between hours studied and test scores.

• Test scores remain constant regardless of hours studied.

Which of the following best describes a scatterplot with points that form a downward slope from left to right?

• Positive correlation

• Negative correlation

• No correlation

• Perfect correlation

Given a two-way table showing the number of students who prefer different types of music (Pop, Rock, Classical) by gender, how would you calculate the relative frequency of males who prefer Rock music?

• Divide the number of males who prefer Rock by the total number of students.

• Divide the number of males who prefer Rock by the total number of males.

• Divide the number of males who prefer Rock by the total number of students who prefer Rock.

• Divide the number of males who prefer Rock by the total number of females.

A two-way table shows the number of students who passed or failed a test based on whether they attended a review session. How can you use this table to determine if attending the review session is associated with passing the test?

• Compare the total number of students who passed to those who failed.

• Compare the relative frequency of students who passed among those who attended the session to those who did not.

• Compare the total number of students who attended the session to those who did not.

• Compare the number of students who failed among those who attended the session to those who did not.

In a scatterplot, if the points are closely clustered around a line, what does this indicate about the correlation?

• Weak correlation

• Strong correlation

• No correlation

• Random correlation

If a scatterplot shows a perfect positive correlation, what would the correlation coefficient be?

• 0

• 1

• -1

• 0.5

A two-way table shows the number of students who like different sports (Soccer, Basketball, Tennis) by grade level. How can you find the total number of students who like Tennis?

• Add the number of students who like Tennis across all grade levels.

• Subtract the number of students who like Soccer and Basketball from the total number of students.

• Divide the number of students who like Tennis by the total number of students.

• Multiply the number of students who like Tennis by the total number of students.