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What is assumed mean &how can we find it
how to use log & antilogtable to find square roots
What is the difference between mean deviation and standard deviation?
find dy/dx if y =(sec x+tanx )/(secx-tanx)
Find the mean and variance of the first n even natural numbers
When do we use step-deviation method.Please explain the method.
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 ????
From the data given
below state which group is more variable, A or B?
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
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.
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.
Th scores of 10 students in a test,out of maximum marks 50 are as follows :28 , 36 , 34 , 28 , 48 , 22 , 35 , 27 , 19 , 41.
Find the variance.
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
how to calculate assumed mean ?
how come the assumed mean 10 in the 1st video of variance and step deviation?
Define Mean and Median,and also the Difference..
find the variance for the first 25 natural numbers
what is assume mean method ?
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.
Find the mean and
standard deviation using short-cut method.
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.
The variance of 15 observation is 4. If each observation is increased by 9, find the variance of resulting observation.
Find the mean deviation about the median for the data.
If the mean deviation about the median of the numbers a,2a,3a........,50a is 50. Then "modulus of a" equals ?? plz answer fast..
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?
how to take out the square root by completing the squares method
yes... how do you calculate assumed mean?
solution of chapter average due date of maths isc 11 sum 10
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.
what do you mean by statistics?
Find the mean deviation about the median for the following data:
xi : 15 21 27 30 35
fi : 3 5 6 7 8
how to solve question no 5 of page 376 stat of class 11 explain in a easy way
Given thatisthe mean and σ2is the variance of n observations x1, x2… xn. Prove that the mean andvariance of the observations ax1, ax2,ax3 …axn are and a2 σ2,respectively (a ≠ 0).
I can`t understand example 2 plz. explain it i have my maths exam on Friday.
the following are the run score by two batsmen A and B in 10 innings. find who is more consistence?
A: 101. 20. 0. 36. 82. 45. 7. 13. 65. 14
B: 97. 12. 40. 96. 13. 8. 85. 8. 56. 15
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
Find the mean deviation
about median for the following data:
Number of girls
13, 17, 16, 14, 11, 13, 10, 16, 11, 18, 12, 17
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