NCERT Exemplar Solutions
Class 7 - Mathematics - Unit 3: Data HandlingFill in the Blanks
Class 7 - Mathematics - Unit 3: Data Handling
Question. 17
The difference between the highest and the lowest observations of a data is called ________.
Answer:
The difference between the highest and the lowest observations of a data is called Range.
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Question. 18
The mean of a data is defined as ________.
Answer:
The mean of a data is defined as \(\dfrac{\text{Sum of all observations}}{\text{Number of observations}}\).
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Question. 19
In a set of observations, the observation that occurs the most often is called ________.
Answer:
In a set of observations, the observation that occurs the most often is called Mode.
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Question. 20
In a given data, arranged in ascending or descending order, the middle most observation is called ________.
Answer:
In a given data, arranged in ascending or descending order, the middle most observation is called Median.
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Question. 21
Mean, Median, Mode are the measures of ________.
Answer:
Mean, Median, Mode are the measures of Central tendency.
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Question. 22
The probability of an event which is certain to happen is ________.
Answer:
The probability of an event which is certain to happen is 1.
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Question. 23
The probability of an event which is impossible to happen is ________.
Answer:
The probability of an event which is impossible to happen is 0.
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Question. 24
When a die is thrown, the probability of getting a number less than 7 is ________.
Answer:
When a die is thrown, the probability of getting a number less than 7 is 1.
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Question. 25
In throwing a die the number of possible outcomes is ________.
Answer:
In throwing a die the number of possible outcomes is 6.
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Question. 26
________ can be used to compare two collections of data.
Answer:
A double bar graph can be used to compare two collections of data.
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Question. 27
The representation of data with bars of uniform width is called ________.
Answer:
The representation of data with bars of uniform width is called Bar graph.
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Question. 28
If the arithmetic mean of 8, 4, x, 6, 2, 7 is 5, then the value of x is ________.
Answer:
If the arithmetic mean of 8, 4, x, 6, 2, 7 is 5, then the value of x is 3.
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Question. 29
The median of any data lies between the ________ and ________ observations.
Answer:
The median of any data lies between the Minimum and Maximum observations.
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Question. 30
Median is one of the observations in the data if number of observations is ________.
Answer:
Median is one of the observations in the data if number of observations is Odd.
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Question. 31
Rohit collected the data regarding weights of students of his class and prepared the following table:
| Weight (in kg) | 44–47 | 48–51 | 52–55 | 56–60 |
|---|---|---|---|---|
| Number of Students | 3 | 5 | 25 | 7 |
A student is to be selected randomly from his class for some competition. The probability of selection of the student is highest whose weight is in the interval ________.
Answer:
The probability of selection of the student is highest whose weight is in the interval 52–55.