Select Board & Class
What is assumed mean &how can we find it
how to use log & antilogtable to find square roots
find dy/dx if y =(sec x+tanx )/(secx-tanx)
What is the difference between mean deviation and standard deviation?
When do we use step-deviation method.Please explain the method.
Find the mean and variance of the first n even natural numbers
how to calculate assumed mean ?
how come the assumed mean 10 in the 1st video of variance and step deviation?
the mean and standard deviation of 100 observations were calculated as 40 and 5.1 resp. by a student who took by mistake 50 instead of 40 for one observation. what are correct mean and standard deviation?
what is central tendency ????
if the sum of the squares of deviations for 10 observations taken from their mean is 2.5,then write the value of standard deviation
what is the meaning of discrete frequency distribution ?
The variance of 15 observations is 4.If each observation is increased by 9,find the variance of the resulting observations?
please give a detailed expalanation
the mean of 5 observations is 4.4 and their variance is 8.24.if three of the observations are 1,2,6 .,find the other two observations.....
Find the mean deviation from the mean and standard deviation of the series:
a, a+d, a+2d, ....., (a+nd), .... a+(2n-1)d, a+2nd
Wages (up to ) 10 20 30 40 50 60 70 80 no. of workers 12 30 65 107 157 202 222 230find the coefficient of variation ?
let x1, x2, x3,....... xn be n values of a variable X. If these values are changed to x1+a, x2+a,.... xn +a, where a belongs to R, show that the variance remains unchanged.
and standard deviation of marks obtained by 50 students of a class in
three subjects, Mathematics, Physics and Chemistry are given below:
the three subjects shows the highest variability in marks and which
shows the lowest?
and variance of 7 observations are 8 and 16, respectively. If five of
the observations are 2, 4, 10, 12 and 14. Find the remaining two
how to find assumed mean in statistics
Define Mean and Median,and also the Difference..
method to find square root of 127.69
An analysis of monthly
wages paid to workers in two firms A and B, belonging to the same
industry, gives the following results:
No. of wage earners
Mean of monthly wages
Variance of the distribution of
(i) Which firm A or B
pays larger amount as monthly wages?
(ii) Which firm, A or
B, shows greater variability in individual wages?
find the variance for the first 25 natural numbers
what is assume mean method ?
The following is therecord of goals scored by team A in a football session:
No. of goals scored
No. of matches
For the team B, meannumber of goals scored per match was 2 with a standard
deviation 1.25 goals.Find which team may be considered more consistent?
how can we choose assumed mean?
The mean and standard deviation of a group of 100 observations were found to be 20 and 3 respectively.Later on it was found that 3 observations were incorrect which were recorded as 21,21 and 18.Find the mean and Standard deviaton if the incorrect observations were omitted.
Find the mean and
standard deviation using short-cut method.
An original frequency table with mean 11 and variance 9.9 was lost but the following table derived from it was found. Contruct the original table.
Value of 'd':- -2,-1,0,1,2
Why is the sum of observations divided by TOTAL NUMBER OF OBSERVATIONS ??!! I know it is a formula...but i need a logical answer!
please can you write the all formulas of Statistics....plz
The variance of 15 observation is 4. If each observation is increased by 9, find the variance of resulting observation.
If the mean deviation about the median of the numbers a,2a,3a........,50a is 50. Then "modulus of a" equals ?? plz answer fast..
if each of the observations x1,x2,x3,.....,xn is increased by a, where a is a negative or positive number show that the variance remains unchanged.
how to take out the square root by completing the squares method
yes... how do you calculate assumed mean?
and variance of eight observations are 9 and 9.25, respectively. If
six of the observations are 6, 7, 10, 12, 12 and 13, find the
remaining two observations.
solution of chapter average due date of maths isc 11 sum 10
The age distribution of 100 life-insurance policy holders is as follows
Age (on nearest 17-19.5 20-25.5 26-35.5 36-40.5 41-50.5 51-55.5 56-60.5 61 - 70.5
No of persons 5 16 12 26 14 12 6 5
Calcualte the mean deviation from the median age.
what do you mean by statistics?
I can`t understand example 2 plz. explain it i have my maths exam on Friday.
how to solve question no 5 of page 376 stat of class 11 explain in a easy way
find the ratio in which the line joining the line joining the points 1,2,3,and -3,4,-5 by xy plane
Find the mean and
variance for the first n natural numbers
Copyright © 2020 Applect Learning Systems Pvt. Ltd. All rights reserved.
E.g: 9876543210, 01112345678
We will give you a call shortly, Thank You
Office hours: 9:00 am to 9:00 pm IST (7 days a week)