Home
Class 12
MATHS
The first of two samples has 100 times w...

The first of two samples has 100 times with mean 15 and standard deviations 3. If the whose group has 250 items with mean 15.6 and standard deviation ` sqrt(3.44)` Find the standard deviation of the second group.

A

5

B

4

C

6

D

3.52

Text Solution

Verified by Experts

Promotional Banner

Similar Questions

Explore conceptually related problems

Find the standard deviation of first n natural numbers.

Find the mean and standard deviation from the following data :

Find the mean and the standard deviation from the following:

A shopkeeper mixes a batch of 200 apples of mean mass 150 g and standard deviation 30 g with another batch of 300 apples of mean 100 g and standard deviation 20 g. Find the standard deviation for the combined batch of 500 apples.

A sample of 35 observations has mean 80 men and standard deviation 4. A second sample of 65 observations has mean 70 and standard deviation =3. Find the combined mean and standard deviation.

Out of total sample survey of 100 nuts, in a first sample survey of 35 items has mean 80 and standard deviation 4. A second sample survey of 65 items has mean 70 and standard deviation 3. Find the mean and variance of combined 100 sample nuts.

Find the mean and standard deviation using short cut method

If standard deviation of 1,2,3,4,….,10 is sigma then standard deviation of 11, 12, …20 is

Find the standard deviation of the first five even natural numbers.

In a binomial distribution the mean is 12 and the standard deviation is sqrt3 . Then the distribution is