ISEE Lower Level Quantitative : Data Analysis

Study concepts, example questions & explanations for ISEE Lower Level Quantitative

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Example Questions

Example Question #1 : How To Use A Venn Diagram

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The Venn diagram shown above has three categories that represent information about the Wildcats varsity baseball team. 

Category  represents the number of players on the team that are left-handed.
Category  represents the numebr of players on the team that are pitchers. 
And, the overlapping portion of the Venn diagram represents the number of players that are left-handed pitchers. 

Given that  and that there are  players in the overlapping region of the diagram.

How many players are right-handed pitchers? 

Possible Answers:

Correct answer:

Explanation:

Since the question provides the information that there are  left-handed pitchers and  total pitchers, one can infer that the number of right-handed pitchers is equal to the difference between the total number of pitchers and the number of left-handed pitchers. 

Thus, the solution is:

Example Question #3 : How To Use A Venn Diagram

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The Venn diagram shown above has three categories that represent information about the Wildcats varsity baseball team. 

Category  represents the number of players on the team that are left-handed.
Category  represents the numebr of players on the team that are pitchers. 
And, the overlapping portion of the Venn diagram represents the number of players that are left-handed pitchers. 

Given that  and that there are  players in the overlapping region of the diagram.

What fraction of the players are only left-handed? 

Possible Answers:

Correct answer:

Explanation:

Since, there are  left-handed players total and  left-handed pitchers there must be  players that are left-handed but do not pitch, because .

To find what fraction this represents we need to do:

Example Question #4 : How To Use A Venn Diagram

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In the above Venn diagram category  represents the number of Kevin's friends that play the flute, while category  represents the number of Kevin's friends that play the bass. 

If  of Kevin's friends only play the flute and  of his friends only play the bass, then what fraction of Kevin's friends play both instruments?

Possible Answers:

Correct answer:

Explanation:

To find the fraction of Kevin's friends that play both the bass and the flute, consider that the fraction  represents all of Kevin's friends in this senario.

Thus, the solution can be found by adding those that only play flute with those that only play bass and subtracting that final answer from the fraqction that represents all of Kevin's friends:

Example Question #54 : Data Analysis

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In the above Venn diagram category  represents the number of Kevin's friends that play the flute, while category  represents the number of Kevin's friends that play the bass. 

If  of Kevin's friends only play the flute and  of his friends only play the bass, then what percentage of Kevin's friends only only play the bass? 

Possible Answers:

 

 

 

 

Correct answer:

 

Explanation:

 of Kevin's friends only play the bass.

Thus, to find the fractional equivalent we need to multiply the fraction by 100.

The solution becomes:


Example Question #51 : Data Analysis

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The Venn diagram above represents the results from a recent survey given to middle school students. Category  represents the amount of students that only like pizza. Category  represents the amount of students that only chicken nuggets.   

What percentage of students only like pizza? 

Possible Answers:

 

 

 

 

Correct answer:

 

Explanation:

Since Category  represents the amount of students that only like pizza--and shows an amount of  percent in the Venn diagram, no calculations need to be performed. 

Our answer is .

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