Home
Class 8
MATHS
If the mean of a set of observations x(1...

If the mean of a set of observations `x_(1), x_(2),….., ……, x_(10) " is " 20`. Find the mean of `x_(1) + 4, x_(2) + 8, x_(3) + 12, …., ……, x_(10) + 40`.

Text Solution

Verified by Experts

The correct Answer is:
42
Promotional Banner

Similar Questions

Explore conceptually related problems

The mean of the observations x-1, x and x + 1 is

The variance of observation x_(1), x_(2),x_(3),…,x_(n) is sigma^(2) then the variance of alpha x_(1), alpha x_(2), alpha x_(3),….,alpha x_(n), (alpha != 0) is

Consider any set of 201 observation x_(1),x_(2)………..,x_(200),x_(201) . It is given that x_(1) lt x_(2) lt …… lt x_(200) lt x_(201) . Then the mean deviation of this set of observations about a point k is minimum which k equals.

The means and variance of n observations x_(1),x_(2),x_(3),…x_(n) are 0 and 5 respectively. If sum_(i=1)^(n) x_(i)^(2) = 400 , then find the value of n

Mean of n-observations x_1,x_2 ,……………., x_n repeated f_1, f_2, f_3 ……………. f_n times if……….

Observe the following statements : (A) : 10 is the mean of a set of 7 obervations and 5 is the mean of a set of 3 observations. The mean of a combined set is 9. (R ) : If bar(x)_(i)(i = 1,2,…,k) are the means of k - series n_(i)(I = 1,2,3,…,k) respectively, then the combined or composite mean is bar(x) = (n_(1)bar(x)_(1) + n_(2) bar(x)_(2) + ...+ n_(k)bar(x_(k)))/(n_(1)+n_(2)+...+n_(k))

If the mean of x_1, x_2, ....., x_n is barx then the mean of x_1/a,x_2/a, .... x_n/a is .......