English

Mean of the observations can be lesser than each of the observations.

Advertisements
Advertisements

Question

Mean of the observations can be lesser than each of the observations.

Options

  • True

  • False

MCQ
True or False
Advertisements

Solution

This statement is False.

Explanation:

Mean is the average value of all the observations. Some of the observations are less than it and some of the observations are more than it.

shaalaa.com
  Is there an error in this question or solution?
Chapter 3: Data Handling - Exercise [Page 75]

APPEARS IN

NCERT Exemplar Mathematics Exemplar Class 7
Chapter 3 Data Handling
Exercise | Q 44. | Page 75

Video TutorialsVIEW ALL [2]

RELATED QUESTIONS

The mean of 5 observations is 50. One of the observations was removed from the data, hence the mean became 45. Find the observation which was removed.


If `barx` is the mean of x1, x2 ............xn and `bary` is the mean of y1, y2, …….yn and `barz` is the mean of x1, x2 ............xn, y1, y2, ……….yn then `barz` =?


The mean of five numbers is 50, out of which mean of 4 numbers is 46, find the 5th number:


The following table shows the number of saplings planted by 30 students. Fill in the boxes and find the average number of saplings planted by each student.

No. of saplings
(Scores) xi
No. of students
(frequency) fi
fi x xi
1 4 4
2 6 `square`
3 12 `square`
4 8 `square`
  N = `square` ∑fixi =  `square`

Mean `bar "x"` = `square/"N"`

= `square/square`

= `square`

∴ The average number of trees planted `square`


In a week, temperature of a certain place is measured during winter are as follows 26°C, 24°C, 28°C, 31°C, 30°C, 26°C, 24°C. Find the mean temperature of the week


The mean of a set of seven numbers is 81. If one of the numbers is discarded, the mean of the remaining numbers is 78. The value of discarded number is


Arithmetic mean of 15 observations was calculated as 85. In doing so an observation was wrongly taken as 73 for 28. What would be correct mean?


Which measures of central tendency get affected if the extreme observations on both the ends of a data arranged in descending order are removed?


The following are weights (in kg) of 12 people.

70, 62, 54, 57, 62, 84, 75, 59, 62, 65, 78, 60.

  1. Find the mean of the weights of the people.
  2. How many people weigh above the mean weight?
  3. Find the range of the given data.

The mean age of 25 teachers in a school is 40 years. A teacher retires at the age of 60 years and a new teacher is appointed in his place. If the mean age of the teachers in this school now is 39 years, then the age (in years) of the newly appointed teacher is ______.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×