Comparing Two Stem-and-Leaf Plots

Grade 6th

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| By Thames

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| Questions: 20 | Updated: Oct 31, 2025

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1) Which class has the greater range of times?

Class A

Class B

They have the same range

Not enough information

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.

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.

Submit

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! see less

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2) Which class has the higher median time?

Class B

Class A

They have the same median

Not enough information

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.

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.

Submit

3) Which class shows more variability in times?

Class A

Class B

They have the same variability

Not enough information

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.

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.

Submit

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

About 43 minutes

About 47 minutes

About 52 minutes

About 58 minutes

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.

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.

Submit

5) Which statement best compares the distributions?

Class A is more spread out and higher on average

Class B is slightly higher on average and more spread out

Class A is lower on average and more spread out

Class B is lower on average and less spread out

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.

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.

Submit

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

Class A

Class B

They have the same IQR

Not enough information

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.

Explanation

Submit

7) What is the minimum time in Class B?

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

So, the minimum is 32 minutes.

Explanation

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

So, the minimum is 32 minutes.

Submit

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

Class A’s maximum is larger

Class B’s maximum is larger

They have the same maximum

Not enough information

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.

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.

Submit

9) Which team has the older oldest player?

Team Red

Team Blue

They are the same

Not enough information

Team Red’s highest age = 22 years.

Team Blue’s highest age = 24 years.

So, Team Blue’s oldest player is older.

Explanation

Team Red’s highest age = 22 years.

Team Blue’s highest age = 24 years.

So, Team Blue’s oldest player is older.

Submit

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

Team Red

Team Blue

They are the same

Not enough information

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.

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.

Submit

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

Team Red

Team Blue

They are equally skewed

Not enough information

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.

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.

Submit

12) What is the median age for Team Red?

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

So, the median age is 13.

Explanation

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

So, the median age is 13.

Submit

13) Which team likely has the greater IQR?

Team Red

Team Blue

They are the same

Not enough information

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.

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.

Submit

14) Which statement best compares centers and spreads?

Same center, Team Red has larger spread

Same center, Team Blue has larger spread

Team Blue has a slightly higher center and larger spread

Team Red has a higher center and smaller spread

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.

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.

Submit

15) Which class has the larger maximum length?

Class 1

Class 2

They are the same

Not enough information

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.

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.

Submit

16) Which class has the smaller minimum length?

Class 2

Class 1

They are the same

Not enough information

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.

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.

Submit

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

Class 2

Class 1

They are the same

Not enough information

Both classes have middle values around 7.6 cm.

So, the median lengths are about the same.

Explanation

Both classes have middle values around 7.6 cm.

So, the median lengths are about the same.

Submit

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

Class 1

Class 2

They are the same

Not enough information

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.

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.

Submit

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

Class 1: 7.2 cm; Class 2: 7.3 cm

Class 1: 7.6 cm; Class 2: 8.0 cm

Class 1: 7.6 cm; Class 2: 7.8 cm

Class 1: 8.2 cm; Class 2: 8.6 cm

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.

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.

Submit

20) Which statement about variability is most accurate?

Class 1 has a larger range and IQR

Class 2 has a larger range and likely a larger IQR

Both classes have the same range and IQR

Class 1 has a smaller range but a larger IQR

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

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

Submit

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All (20)
Unanswered ()
Answered ()

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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