Comparing Two Stem-and-Leaf Plots

  • 6th Grade
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Cierra Henderson, MBA |
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Cierra is an educational consultant and curriculum developer who has worked with students in K-12 for a variety of subjects including English and Math as well as test prep. She specializes in one-on-one support for students especially those with learning differences. She holds an MBA from the University of Massachusetts Amherst and a certificate in educational consulting from UC Irvine.
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| Questions: 20 | Updated: Jan 21, 2026
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1) Which class has the greater range of times?

Explanation

Class A range = 62 − 35 = 27 minutes.

Class B range = 64 − 32 = 32 minutes.

Since 32 > 27, Class B has the greater range, meaning its times are spread out more.

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About This Quiz
Comparing Two Stem-and-leaf Plots - Quiz

Ready for a challenge that will put your data analysis skills to the test? In this quiz, you'll compare two stem-and-leaf plots filled with interesting data sets! From math puzzle completion times to soccer player ages and plant growth, you’ll dive into the details, exploring ranges, medians, and variability. Think... see moreyou can spot which group is faster, older, or growing better? With each question, you’ll sharpen your skills in comparing data sets and drawing meaningful conclusions. By the end, you’ll be a pro at analyzing and comparing data like a true statistician!
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2) Which class has the higher median time?

Explanation

Class A has 13 values. The 7th value (median) = 47 minutes.

Class B has 14 values. Median = average of 7th & 8th = (45 + 48)/2 = 46.5 minutes.

So, Class A’s median (47) is slightly higher.

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3) Which class shows more variability in times?

Explanation

Class B’s times range from 32 to 64, while Class A’s range from 35 to 62.

A larger range means more variability.

So, Class B’s times vary more.

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4) Approximately where is the center (median) of Class A's times?

Explanation

The middle value (median) of Class A’s data is around 47 minutes, which represents the center of the data.

So, the center of Class A’s times is about 47 minutes.

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5) Which statement best compares the distributions?

Explanation

Class A’s times are mostly between 30–50 minutes, while Class B’s are between 40–60 minutes.

That means Class A is lower overall and has a wider spread of times.

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6) Which class likely has the smaller interquartile range (IQR)?

Explanation

Class A’s middle values (40s–50s) are closer together than Class B’s, whose middle values spread across 40s–60s.

So, Class A’s IQR is smaller, showing less variation in the middle 50% of data.

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7) What is the minimum time in Class B?

Explanation

The smallest time in Class B is from the first leaf (3|2), which means 32 minutes.

So, the minimum is 32 minutes.

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8) Which of the following is true about the maximums?

Explanation

Class A’s highest time is 6|2 → 62 minutes.

Class B’s highest time is 6|4 → 64 minutes.

Since 64 > 62, Class B’s maximum is larger.

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9) Which team has the older oldest player?

Explanation

Team Red’s highest age = 22 years.

Team Blue’s highest age = 24 years.

So, Team Blue’s oldest player is older.

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10) Which team has the greater number of players age 12–15 (inclusive)?

Explanation

Ages 12–15:

Team Red has 12, 12, 13, 14, 15 → 5 players.

Team Blue has 12, 13, 13, 15 → 4 players.

So, Team Red has more players aged 12–15.

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11) Which team's distribution is more skewed toward higher ages?

Explanation

Team Blue’s data go up to 24 years, with several high values in the 20s.

That means Team Blue’s distribution is more skewed toward higher ages.

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12) What is the median age for Team Red?

Explanation

Team Red has 11 data points. The 6th one (middle) is 13 years.

So, the median age is 13.

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13) Which team likely has the greater IQR?

Explanation

Team Blue’s ages range from 10–24, while Team Red’s are 10–22.

A wider spread means a larger IQR.

So, Team Blue’s IQR is greater.

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14) Which statement best compares centers and spreads?

Explanation

Team Blue’s ages extend higher (up to 24) and are more spread out.

That means Team Blue has both a higher center and greater variability.

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15) Which class has the larger maximum length?

Explanation

Class 1’s largest leaf is 9|1 → 9.1 cm.

Class 2’s largest leaf is 9|2 → 9.2 cm.

So, Class 2 has the larger maximum.

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16) Which class has the smaller minimum length?

Explanation

Class 1’s smallest leaf is 6|8 → 6.8 cm.

Class 2’s smallest leaf is 6|5 → 6.5 cm.

So, Class 2 has the smaller minimum.

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17) Which class appears to have a higher median length?

Explanation

Both classes have middle values around 7.6 cm.

So, the median lengths are about the same.

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18) Which class's data are more tightly clustered (smaller spread)?

Explanation

Class 2’s data are closer together (6.5–9.2) than Class 1’s (6.8–9.1).

This means Class 2’s values are more tightly clustered.

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19) If you were to choose a typical value (center) to represent each class, which is most reasonable?

Explanation

Typical center values (medians) are around 7.6 cm for Class 1 and 7.8 cm for Class 2.

So, C is the most reasonable choice.

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20) Which statement about variability is most accurate?

Explanation

Class 1 range = 9.1 − 6.8 = 2.3 cm.

Class 2 range = 9.2 − 6.5 = 2.7 cm.

Since both range and IQR are wider, Class 2 shows greater variability

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Cierra Henderson |MBA |
K-12 Expert
Cierra is an educational consultant and curriculum developer who has worked with students in K-12 for a variety of subjects including English and Math as well as test prep. She specializes in one-on-one support for students especially those with learning differences. She holds an MBA from the University of Massachusetts Amherst and a certificate in educational consulting from UC Irvine.
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Which class has the greater range of times?
Which class has the higher median time?
Which class shows more variability in times?
Approximately where is the center (median) of Class A's times?
Which statement best compares the distributions?
Which class likely has the smaller interquartile range (IQR)?
What is the minimum time in Class B?
Which of the following is true about the maximums?
Which team has the older oldest player?
Which team has the greater number of players age 12–15...
Which team's distribution is more skewed toward higher ages?
What is the median age for Team Red?
Which team likely has the greater IQR?
Which statement best compares centers and spreads?
Which class has the larger maximum length?
Which class has the smaller minimum length?
Which class appears to have a higher median length?
Which class's data are more tightly clustered (smaller spread)?
If you were to choose a typical value (center) to represent each...
Which statement about variability is most accurate?
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