Learn Class 7 Math - Data Handling

The term data handling includes various terms like a collection of data, range, frequency, mean, median and mode. The collection of data will make everything clear. But before the collection of data, we must need specific details about the concept.

Suppose we collect the data of class students, then we must know their actual performance. And how they deal with it.

Data

At first, the data will get collected from several pieces.
After the collection of data, it will get organised.
And at last, it will get represented.

Average

The term 'average' refers to the central tendency of the group.

Mean

The term 'mean' refers to the total observation sum and the number of outcomes.
We will get the result by dividing the sum term by the total outcomes.

Range

The term 'range' refers to the difference between the highest and lowest observation.
Range = Highest Observation - Lowest Observation.

Mode

The term 'mode' refers to the highest number of items in a given sequence.
Example: 2, 3, 4, 2, 3, 3, 3, 4, 5, 3. Here, 3 is the mode.

Median

The term 'median' refers to the centre part of the sequence.
Example: 12, 14, 15, 18, 20, 22. Here, 15 is the median.
In the odd number series, the median is the middle number.
And in an even number series, the median is the total divided by 2.

Learning Videos for 7th Grade Math - Data Handling

Data Handling Sample Questions for Class 7

Question 1

Find the mean (average) of the set of data.20, -14, -4, 8, 17, 3

A. 10

B. 6

C. 11

D. 5

Question 2

The line plots show the number of books read by the students in Mr. Murray's class and Ms. Stein's class.Mr. Murray's Class:Ms. Stein's Class: Which statement best compares the median number of books read by the students in each class?

A. The median number of books read by Mr. Murray's class is 3 more than the median number of books read by Ms. Stein's class.

B. The median number of books read by Ms. Stein's class is 3 more than the median number of books read by Mr. Murray's class.

C. The median number of books read by Mr. Murray's class is 5 more than the median number of books read by Ms. Stein's class.

D. The median number of books read by Ms. Stein's class is 5 more than the median number of books read by Mr. Murray's class.

Question 3

What is the product of the following numbers? 1.2 x 3.2 x -2.1

A. -8.064

B. 8.64

C. -25.2

D. 8.04

Question 4

Which of the following would be the best way to estimate the average number of songs a seventh grade student in your school downloads each month?

A. Survey 25 sixth grade students in your school.

B. Survey 2 seventh grade students in your school.

C. Survey half of the seventh grade students in your school.

D. Survey 100 seventh grade students from two middle schools.

Question 5

Tatesville had x inches of rainfall in April, (x + 1.3) inches of rainfall in May, and (2x + 0.5) inches in June. If x = 2 inches, what is the amount of rainfall for Tatesville during the three-month period?

A. 9.2 inches

B. 9.4 inches

C. 9.6 inches

D. 9.8 inches