MyQuestionIcon

3

You visited us 3 times! Enjoying our articles? Unlock Full Access!

Mean for Frequency Distribution Table

Find the mean...

Question

Find the mean of the following $20$ observations:
$12, 2, 3, 3, 2, 12, 12, 1, 4, 5, 4, 4, 3, 11, 11, 2, 6, 2, 3, 6, 12$ .

A

4

No worries! We‘ve got your back. Try BYJU‘S free classes today!

B

5

No worries! We‘ve got your back. Try BYJU‘S free classes today!

C

6

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

D

7

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is B $6$
Arithmetic mean using direct method formula is $¯ x = \frac{\sum f_{i} x_{i}}{\sum f_{i}}$ .
$∴ ¯ x = \frac{120}{20} = 6$ .

Hence, option $C$ is correct.

Suggest Corrections

thumbs-up

1

Similar questions

Q. Find the mean of the following data.

6

distinct observations is

6.5

and their variance is

10.25.

4

6

observations are

2, 4, 5

7,

then the remaining two observations are

Q. The mean of the mode, median and range of the following marks obtained by 20 students 4, 6, 5, 9, 3, 2, 7, 7, 6, 5, 4, 9, 10, 10, 3, 4, 7, 6, 9, 9 is approximately

Q. Organize the following marks in a class assessment, in a tabular form:
4, 6, 7, 5, 3, 5, 4, 5, 2, 6, 2, 5, 1, 9, 6, 5, 8, 4, 6, 7.
Find the arithmetic mean

Q. The mean and variance of 7 observations are 8 and 16, respectively. If 5 of the observations are 2, 4, 10, 12, 14, find the remaining 2 observations.

Or

Calculate the mean deviation about the mean of the following data.

\begin{matrix} Classes & 10 - 20 & 20 - 30 & 30 - 40 & 40 - 50 & 50 - 60 & 60 - 70 & 70 - 80 Frequency & 2 & 3 & 8 & 14 & 8 & 3 & 2 \end{matrix}

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Measures of Central Tendency

MATHEMATICS

Watch in App

explore_more_icon

Explore more

Mean for Frequency Distribution Table

Standard VII Mathematics

Join BYJU'S Learning Program

CrossIcon