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Syllabus

write 3 difference between inclusive and exclusive series.

What are the objectives of measures of dispersion?

Calculate mean deviation from the following data, using mean and median respectively.4, 6, 8, 10, 12, 14, 16SIZE2, 4, 5, 3, 2, 1, 4FREQUENCYI want full solutions of economics -TR JAIN and VK OHRI

Q.1. Calculate mean , standard deviation and variance :

Variable : 0-5 5-10 10-15 15-20 20-25 25-30 30-35 35-40

frequency : 2 5 7 13 21 16 8 3

Q.2. The number examined , the meanweight and standard deviation in each group of examination by two medical examiners are given below . calculate mean and standard deviation of both the group taken together .

Medical examiner number examined mean weight (lbs) standard deviation (lbs)

A 50 113 6.5

B 60 120 8.2

Q.3. You are given the following data about height of boys and girls :

Boys Girls

Number 72 38

Average height (in inches) 68 61

Variance of distribution (in inches) 9 4

(a) calculate cofficient of variation

(b) decide whose height is more variable .

Discuss the importance of measures of Dispersion?

(a) 8 %

(b) 7.5 %

(c) 4 %

(d) None of these

answers of NM SHAH statistics class 11 chapter 10

Measurement of Range in Continuous SeriesRange= Upper Limit of the Highest Class Interval - Lower Limit of the Lowest Class Interval

: Range is the difference of the mid value of the highest class and that of the lowest class.Method 2Range= Mid-Value of the Highest Class Interval - Mid-Value of the Lowest Class Interval

: For the following data calculate the range.ExampleXf0-10

10

10-20

15

20-30

11

30-40

17

40-50

13

:SolutionMethod 2: Range = Mid-Value of the Highest Class Interval - Mid-Value of the Lowest Class IntervalRange = 45 5= 40

Q) In finding the mid value we should use ' + ' sign or ' - ' sign ?

The solution you have presented is wrong as (50-40)/2 = 45 as it should be (50+40)/2 = 45.

it is for both the cases

case 1 :- MID VALUE OF HIGHEST CLASS INTERVAL

case 2 :- MID VALUE OF LOWEST CLASS INTERVAL

Items

5 10 15 20 25 30 35 40

Frequency

8 16 18 22 14 9 6 7

What are the properties of a good measure of dispersion?

solutions for n m shah

Q. Calculate Standard Deviation by Assumed mean method in individual series ?

X

5

6

9

4

12

11

Week

1 2 3 4 5 6 7 8 9 10

Earnings (in ) 54 62 63 65 68 71 73 78 82 84

lorenz curve how to find cumulative percentage?

Population No of villages

0-200. 10

200-400. 28

400-1000. 42

1000-1200. 18

2000-5000 6

Mathmatical Questions

Q.1. Calculate quartile deviation and its cofficient of rajesh 's income .

markas : 12 34 5 6 7 8 9 19 1112

income(Rs) : 239 250 251 251 257 258 260 261262 262273 275

Q.2. Calculate meandeviation from (1) arithmeticmean (2) median :

marks: 7 4 10 9 15 12 7 9 7

Q.3. Calculate (a) median cofficient of dispersion , and (b) mean cofficient of dispersion from the following data :

size of item : 4 6 8 10 12 14 16

frequency : 2 4 5 3 2 1 4

A: 12 115 6 73 7 19 119 36 84 29

B: 47 12 76 42 4 51 37 48 13 0

Who is better as a run-getter? Who is more consistent?

answers of NM SHAH statistics class 11 chapter 10

b. Calculate coefficient of correlation from the following data.X 1 2 3 4 5 6 7 8 9Y 9 8 10 12 11 13 14 16 15

The yield of wheat and rice per acre for 10 districts of a state is as under:

District

1

2

3

4

5

6

7

8

9

10

Wheat

12

10

15

19

21

16

18

9

25

10

Rice

22

29

12

23

18

15

12

34

18

12

Calculate for each crop,

(i) Range

(ii) Q.D.

(iii) Mean Deviation about Mean

(iv) Mean Deviation about Median

(v) Standard Deviation

(vi) Which crop has greater variation?

(vii) Compare the value of different measures for each crop.

prepare a pie-chart from the following data:

sector

primary

secondary

transport

Finance and insurance

Community and social services

Percent share

18.2

23

27.8

17.5

13.5

can i get the solution of T.R.Jain of economics class 11?

how do we draw lorenz curve

a)mean b)mean deviation c)standard deviation d)lorez curve

draw lorenz curve

INCOME-- 2500 7500 15000 30000 45000

NO. OF PEOPLE-- 5 10 28 10 7

Explain briefly the role of computer in statistics

Size

4 6 8 10 12 14 16

16

Frequency

2 4 5 3 2 14

A batsman is to be selected for a cricket team. The choice is between X and Y on the basis of their scores in five previous tests which are:

X

25

85

40

80

120

Y

50

70

65

45

80

Which batsman should be selected if we want,

(i) a higher run getter, or

(ii) a more reliable batsman in the team?

Age Group

20-30 30-40 40-50 50-60 60-70

Number of Workers

8 12

20 16

16 4

three difference between standard deviation and mean deviation

Which measure of dispersion is the best and how?

size: 10 20 30 40 50 60 70

frequency 6 8 16 15 33 11 12

what are open ended series?

In a town, 25% of the persons earned more than Rs 45,000 whereas 75% earned more than 18,000. Calculate the absolute and relative values of dispersion.

Average daily wage of 50 workers of a factory was Rs 200 with a Standard Deviation of Rs 40. Each worker is given a raise of Rs 20. What is the new average daily wage and Standard Deviation? Have the wages become more or less uniform?

A.Standard Daviation

B.Quartile Daviation

C.Mean Daviation

D.None of These

The sum of 10 values is 100 and the sum of their squares is 1090. Find out the Coefficient of Variation.

what is marketed surplus?

define infant mortality rate.

state the meaning of occupational structure.

Calculate coefficient of rank correlation between the marks in economics and statistics as indicated by 7 answer book of each subject.

X

20

11

72

65

43

29

50

Y

60

63

26

35

43

51

37

class Frequency

0-10 2

10-20 4

20-30 6

30-40 8

40-50 6

50-60 4

60-70 2

Answer is 15.81but it is applying only for first three methods but it is 1.581 in standard deviation method

please clarify

the data:

852, 635, 792, 836, 750

give any eight examples of standard deviation from individual series and discrete series

how does it affect calculation of range ??

A measure of dispersion is a good supplement to the central value in understanding a frequency distribution. Comment.

where to find the chapter Q. answers?.......if any one can help me plzzz tell me wher eto get online answers for ch-measures of dispersion statistics of economice by N M Shah......

Calculate standard deviation from the following data:

x: 2 4 6 8 10

f: 4 6 8 7 5

The yield of wheat and rice per acre for 10 districts of a state is as under:

District 1 2 3 4 5 6 7 8 9 10

wheat 12 10 15 19 21 16 18 9 25 10

rice 22 29 12 23 18 15 12 34 18 12

calculate for each crop

1. Range

2. Q.D.

3. Mean deviation about mean

4. Mean deviation about median

5. Standard deviation

6. Which crop has greater variation?

7. Compare the values of different measures for each crop.

if i have to calculate the median and mode of the following data,how will i calculate it?will it be a discrete series or indiviual series?

How to find out corrected mean and corrected S.D. ?

Mathmatical Questions

Q.1. Followingare the marks obtained by students in sec. A and sec B compare the range of marks of student in two sections .

marks (section A) : 20 25 28 45 15 30

marks(section B): 45 52 36 42 28 25

Q.2. Calculate range and coefficient of range for the following data :

Income (Rs) : 50 70 80 90 100 120130 150

No.of Workers : 2 8 12 7 4 3 8 6

Q.3 Calculate range and cofficient of range for the following distribution :

Class : 1-5 6-1011-15 16-2021-25 26-30

frequency : 2 8 15 35 20 10

Q.3. Calculate quartile deviation and its cofficient of rajesh's income .

markas : 12 34 5 6 7 8 9 19 1112

income(Rs) : 239 250 251 251 257 258 260 261262 262273 275

Q.4.Calculate range and cofficientof range for the following data :

Income (Rs) : 50 70 80 90100 120 130 150

No.of Workers : 2 8 12 74 3 8 6

Q.5.CalculateQuartile andcofficient of Quartile Deviation of the foolowing data :

markas : 5-9 10-14 15-19 20-24 25-29 30-34 35-39

students : 1 3 8 5 4 2 2

Q.6. Calculate meandeviation from (1) arithmeticmean (2) median :

marks: 7 4 10 9 15 12 7 9 7

Q.7. Calculate (a) median cofficient of dispersion , and (b) mean cofficient of dispersion from the following data :

size of item : 4 6 8 10 12 14 16

frequency : 2 4 5 3 2 1 4

Pg 316 of book T.R. Jain and V.K. Ohri question no. 2, second last step 11.5 - 4.5 / 11.5 + 4.5 must give the answer 7/16 instead of 7/76 and then the answer should be equal to 0.437.

how do we coefficient of variation in discrete series

Can I get answers to tr jain vk ohri

the daily wages of 10 workers are given below. find out the range and coefficients.

no. of workers: A B C D E F G H I J

wages in (rs) :175 50 50 55 100 90 125 145 70 60

Wage : 0-5 , 5-10, 10-15,15-20,20-25,25-30

worker; 4 , 6 , 3 , 8 , 12 , 7

find out mean deviation and its coefficient of the following data:

Items

5

10

15

20

25

30

35

40