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Syllabus

What is assumed mean &how can we find it

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

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)

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

Find the mean and variance of the first n even natural numbers

Statement I: The mean salary would remain the same.

Statement II: The median salary would remain the same.

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 ????

what is the meaning of discrete frequency distribution ?find the ratio in which the line joining the line joining the points 1,2,3,and -3,4,-5 by xy plane

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.....

the median is 9 and the only mode is 7, what is the

least possible range for the 7 numbers?

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

its urgent..

let x

_{1}, x_{2}, x_{3},....... x_{n }be n values of a variable X. If these values are changed to x_{1}+a, x_{2}+a,.... x_{n}+a, where a belongs to R, show that the variance remains unchanged.The mean 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 observations.

Unable to watch the video. Please rectify the error ASAP.

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?

Find the mean deviation about the mean for the data.

x_{i}5

10

15

20

25

f_{i}7

4

6

3

5

can anyone plz explain me dis as early as possible how 2 find d value of x?

Define Mean and Median,and also the Difference..

Marks : above 30&below 40 below 50 below 60 below 70 below 80 below 90 below 100

No. of Students :3 10 22 37 45 48 50

refresh it .it will come

find the variance for the first 25 natural numbers

What is d

_{i}?,for what it is using,where want to use it.Wages (up to ) 10 20 30 40 50 60 70 80

no. of workers 12 30 65 107 157 202 222 230

find the coefficient of variation ?

what is

method ?assume meanClasses- 30-40 40-50 50-60 60-70 70-80 80-90 90-100

frequency 3 7 12 15 8 3 2

how can we choose assumed mean?

Later on it was found that three observation were incorrect which were recorded as 21,21 and 18 find the mean and standard deviation if the incorrect observation are omitted

Couldn't understand how to find out correct standard deviation... Plzz help

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.

what is the statistics

Find the mean and standard deviation using short-cut method.

x_{i}60

61

62

63

64

65

66

67

68

f_{i}2

1

12

29

25

12

10

4

5

how to solve question no 5 of page 376 stat of class 11 explain in a easy way

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

Frequency(f):- 1,6,7,4,24

An analysis of monthly wages paid to workers in two firms A and B, belonging to the same industry, gives the following results:

Firm A

Firm B

No. of wage earners

586

648

Mean of monthly wages

Rs 5253

Rs 5253

Variance of the distribution of wages

100

121

(i) Which firm A or B pays larger amount as monthly wages?

(ii) Which firm, A or B, shows greater variability in individual wages?

what is the difference between continious frequency distribution and discreet frequency distribution

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

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

yes... how do you calculate assumed mean?

The 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.

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

birth day)

No of persons 5 16 12 26 14 12 6 5

Calcualte the mean deviation from the median age.

solution of chapter average due date of maths isc 11

sum 10what do you mean by statistics?

I can`t understand example 2 plz. explain it i have my maths exam on Friday.

Q2. Mean of n items is $\overline{)x}$. If these x items are successively increased by 2, 2

^{2}, 2^{3},..... 2^{n}then the new mean is(A) $\overline{)x}$ + $\frac{{2}^{\mathrm{n}+1}}{\mathrm{n}}$ (B) $\overline{)x}$ + $\frac{{2}^{\mathrm{n}+1}}{\mathrm{n}}-\frac{2}{\mathrm{n}}$ (C) $\overline{)x}$ + $\frac{{2}^{\mathrm{n}}}{\mathrm{n}}$ (D) None of these

Find the mean and variance for the first

nnatural numbers