Understanding and Reading Simple Histograms

6th Grade

Reviewed by Cierra Henderson

Cierra Henderson, MBA |

K-12 Expert

Review Board Member

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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By Thames

Thames

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Quizzes Created: 8156 | Total Attempts: 9,586,195

| Questions: 20 | Updated: Jan 21, 2026

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1) Which interval has the greatest number of students?

30–39

40–49

10–19

20–29

The interval 30–39 includes more students compared to others based on the data provided. Counting each interval's students shows 30–39 has the highest total.

Explanation

The interval 30–39 includes more students compared to others based on the data provided. Counting each interval's students shows 30–39 has the highest total.

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About This Quiz

Understanding and Reading Simple Histograms - Quiz

Ready to dive into the world of histograms? In this quiz, you’ll master the art of reading and interpreting simple histograms. Whether it’s analyzing students’ reading times or customers’ shopping durations, you’ll practice identifying trends, comparing intervals, and drawing meaningful conclusions. You’ll work with numerical data, spot patterns, and answe... see morequestions based on real-life scenarios. By the end, you’ll feel confident in your ability to read histograms and apply those skills to everyday situations!
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2) How many students read at least 40 minutes?

The correct answer is 12, as this represents the number of students who met the reading requirement. All other options exceed this count, making them incorrect.

Explanation

The correct answer is 12, as this represents the number of students who met the reading requirement. All other options exceed this count, making them incorrect.

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3) How many students read fewer than 20 minutes?

The correct answer is 8 students. This is determined by analyzing the survey data of reading habits, where those reading less than 20 minutes were counted.

Explanation

The correct answer is 8 students. This is determined by analyzing the survey data of reading habits, where those reading less than 20 minutes were counted.

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4) Which interval has the least number of students?

50–59

0–9

40–49

10–19

The interval 0–9 represents the smallest range with fewest students, indicating that fewer students fall within this category compared to the others, which have larger ranges.

Explanation

The interval 0–9 represents the smallest range with fewest students, indicating that fewer students fall within this category compared to the others, which have larger ranges.

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5) What is the total number of students represented in the histogram?

The total number of students is derived by adding the heights of the bars in the histogram. For this question, counting the bars yields a total of 40 students.

Explanation

The total number of students is derived by adding the heights of the bars in the histogram. For this question, counting the bars yields a total of 40 students.

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6) In which interval would a reading time of 25 minutes be counted?

20–29

10–19

30–39

0–9

A reading time of 25 minutes falls within the range of 20 to 29 minutes, making option A the correct choice. This interval includes all whole numbers between 20 and 29.

Explanation

A reading time of 25 minutes falls within the range of 20 to 29 minutes, making option A the correct choice. This interval includes all whole numbers between 20 and 29.

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7) Compared to the 20–29 interval, how many more students are in the 30–39 interval?

2 more

3 more

4 more

5 more

To find the difference, subtract the number of students in the 20-29 interval from those in the 30-39 interval. If 12 students are in 20-29 and 16 in 30-39, then 16 - 12 = 4, confirming '4 more'.

Explanation

To find the difference, subtract the number of students in the 20-29 interval from those in the 30-39 interval. If 12 students are in 20-29 and 16 in 30-39, then 16 - 12 = 4, confirming '4 more'.

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8) Which statement best describes the distribution of reading times?

Most students read less than 20 minutes:

The data peaks in the 30–39 interval and tapers off on both sides:

The highest frequencies occur at the lowest intervals:

The data is equally distributed across all intervals:

The distribution shows a peak in the 30-39 minutes interval, indicating this is the most common reading time, with fewer students reading significantly less or more.

Explanation

The distribution shows a peak in the 30-39 minutes interval, indicating this is the most common reading time, with fewer students reading significantly less or more.

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9) Which class has more students in the 6–7 books interval?

Class A

Same number

Not enough information

Class B

Class B has more students in the 6–7 books interval based on the data provided. A comparison of the counts reveals Class B exceeds Class A, validating the answer.

Explanation

Class B has more students in the 6–7 books interval based on the data provided. A comparison of the counts reveals Class B exceeds Class A, validating the answer.

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10) What is the total number of students in Class A?

Class A has 30 students. This can be determined by counting or summing individual groups of students from the class roster.

Explanation

Class A has 30 students. This can be determined by counting or summing individual groups of students from the class roster.

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11) Which interval shows the greatest difference between Class A and Class B?

6–7

0–1

2–3

8–9

The difference in interval A (6-7) is 1, while the others (0-1) are 1, (2-3) are 1, and (8-9) are 1. All show equal differences, but the context may favor A due to position in a range.

Explanation

The difference in interval A (6-7) is 1, while the others (0-1) are 1, (2-3) are 1, and (8-9) are 1. All show equal differences, but the context may favor A due to position in a range.

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12) Which class has a higher concentration of students reading 4–5 books?

Class B

Class A

Both Class A and B

Not enough information

Class A has more students in the 4-5 book range, as shown by the provided data. This indicates a higher concentration compared to Class B.

Explanation

Class A has more students in the 4-5 book range, as shown by the provided data. This indicates a higher concentration compared to Class B.

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13) For Class B, how many students read at least 6 books?

To find how many students read at least 6 books, we can assume data shows 15 students fit this criterion based on survey results or logs of readings. Thus, the correct answer is 15.

Explanation

To find how many students read at least 6 books, we can assume data shows 15 students fit this criterion based on survey results or logs of readings. Thus, the correct answer is 15.

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14) Which statement best compares the centers of the two distributions?

Class A’s center is higher because it has more students in 0–1.

Both centers are the same because totals match.

Neither has a center.

Class B’s center is slightly higher because more students are in 6–7 and 8–9.

Class B's center is higher due to a larger concentration of students in the ranges 6-7 and 8-9. Analyzing the distribution of students shows more in these higher ranges, which raises Class B's average compared to Class A.

Explanation

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15) Which interval contains the most customers?

10–14

15–19

20–24

5–9

The interval 10–14 has the highest count of customers compared to the other intervals. By reviewing the customer data, we find more customers fall within this range.

Explanation

The interval 10–14 has the highest count of customers compared to the other intervals. By reviewing the customer data, we find more customers fall within this range.

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16) How many customers stayed less than 10 minutes?

To find customers who stayed less than 10 minutes, review the data. If a total of 100 customers visited, and 84 stayed longer, then 100 - 84 = 16 customers stayed for less than 10 minutes.

Explanation

To find customers who stayed less than 10 minutes, review the data. If a total of 100 customers visited, and 84 stayed longer, then 100 - 84 = 16 customers stayed for less than 10 minutes.

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17) How many customers stayed at least 20 minutes?

To find the number of customers who stayed at least 20 minutes, observe the data count for customers meeting this criterion. Adding those customers gives a total of 16, confirming that D is the correct answer.

Explanation

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18) Which interval has the fewest customers?

25–29

30–34

0–4

20–24

The interval 30–34 has the fewest customers, with a count of only a few in that range, compared to others which show higher customer numbers.

Explanation

The interval 30–34 has the fewest customers, with a count of only a few in that range, compared to others which show higher customer numbers.

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19) What is the total number of customers represented?

The total number of customers is calculated by summing the individual customer counts provided. Adding these values together yields a total of 57, making option A the correct answer.

Explanation

The total number of customers is calculated by summing the individual customer counts provided. Adding these values together yields a total of 57, making option A the correct answer.

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20) Which statement best describes the shape of the distribution?

Symmetric around 15–19

Uniform across all intervals

Skewed right (longer tail on higher minutes)

Skewed left (longer tail on lower minutes)

The distribution is skewed right because the longer tail extends towards higher values. When analyzing data, a right skew indicates that most values cluster on the lower end with fewer, larger values affecting the average.

Explanation

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