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formula of mode-economics 11th

Q. Calculate mean: median:and mode

x f

10-20 4

10-30 16

10-40 56

10-50 97

10-60 124

10-70 137

10-80 146

10-90 150

guys please.............. its urgent experts please......reply fast .....

10-40

what are the advantages of diagrammatic presentation of data.(state 3 important points)

"The average income of 100 persons is 20 while the average income of 150 persons is 25. Calculate the average income of 50 persons"

difference between individual series and discrete series???????????pls tell me fast???

Take 15 as assumed average and use Short-cut Method.

Size

20 19 18 17 16 15 14 13 12 11

Frequency 1 2 4 811 10 7 4 2 1

the mean of 10 items was 70.later on it was find that one item 92 was misread as 29 .what was correct mean?

Its urgent ! Please reply

how to find median in unequal class interval

what is statistical average ?And give any four objectives of statistical average .

sandeep garg satistics problem solution 11th

The median of a series is 10.Two additional observations ,7 & 20 are added to series . What will be median of new series?

The most suitable average for qualitative measurement is

(a) arithmetic mean

(b) median

(c) mode

(d) geometric mean

(e) none of the above

8.The following table gives the frequency distribution of marks obtained by 199 students in an examination:

WHAT IS STATISTICAL AVERAGE?WHAT DESIRABLE PROPERTIES SHOULD AN AVERAGE POSSESS?

Q.1 Calculate arithmetic mean of the following data :

profit (in rs) : 0-10 10-2020-30 30-40 40-50 50-60

no of shops : 1218 27 20 17 16

Q.2. A candidate obtains 46% marks in english , 67% in mathematics , 50% in hindi 72% in history and 58% in economics . it is agreed to give triple weight to marks in english and double weight to marks in mathematics as compared to other subjects . calculate weighted mean . Also compare it with simple arithmetic mean .

Q.3. Calculate combined mean :

section mean marks no. of students

A 75 50

B 60 60

C 55 50

find the quartile deviation and its coefficients from the following data

x 10 20 3040 50 60 70 80 90 100

f 2 820 35 42 20 28 26 16 2

average income of 50 families is 3000. Of these average income of 12 families is 1800. Find out the average income of the remaining families

calculate mode of the folllowing series , by using grouping method:

size : 40 44 48 52 56 60 64 68 72 76

frequency: 10 12 14 20 15 20 18 10 8 4

what is the difference between individual and discreet series???

pls ans ...fast it is urgent..

Which average would be suitable in the following cases?

(i) Average size of readymade garments.

(ii) Average intelligence of students in a class.

(iii) Average production in a factory per shift.

(iv) Average wage in an industrial concern.

(v) When the sum of absolute deviations from average is least.

(vi) When quantities of the variable are in ratios.

(vii) In case of open-ended frequency distribution.

weight of eight students in Kg is noted as,

71, 72, 64, 68, 70, 76, 73, 75

find median weight

answer is 71.5 kg but my calculations are not matching. please help and explain

Which average is affected most by the presence of extreme items?

(a) median

(b) mode

(c) arithmetic mean

(d) none of the above

what is mean by mean,median and mode

Marks

4 5 6 7 8

Number of Students

12 10 18 20 24

Calculate arithmetic mean using Direct

THE ARITHMETIC MEAN IS DESCRIBED AS THE CENTRE OF GRAVITY OF THE DISTRIBUTION OF VALUES OF THE VARIABLE.EXPLAIN

Mark's: 1, 2, 3, 4, 6, 8, 9, 10, 11, 13, 15, 17, 19, 20, 21, 22, 23, 24, 25

what are sampling errors and non sampling errors?explain with siutable examples.(6 marks)

from study material

iii) step-deviation method in videographic explanation how could we get h=1000?show the relationship between mean ,median ,mode ?

how to find out the common factor for the formula of finding mean by step deviation method

a housewife uses 10g of wheat, 20 kg of fuel, 5kg of sugar and 2 kg of oil. prices of these items are respectively rs. 1.50 ,50 paise , rs. 2.80 and rs. 10. taking quantites used as weights find out the weighted arithmetic average of these prices.

PRODUCTION 50-53 53-56 56-59 59-62 62-65 65-68 68-71 71-74 74-77

KG/HECTARE

NO. OF FARMS 3 8 14 30 36 28 16 10 5

What is the formula for correct mean and correct frequency distribution?

if the arithmetic mean of the data given below is 28 ,find out the missing frequency

x

0-9

10-19

20-29

30-39

40-49

50-59

f

12

18

27

?

17

6

what are the essentials of a good average?mention any three(3 marks)

mean marks obtanied by a student in his five subject are 15. in eng. he secures 8 marks, in eco. 12, in maths 18, and in commerce 9. find out the marks he secured in statistics.

Height (inches)

57 59 61 63 65 67 69 71 73

Number of Persons 1 3 7 10 11 15 10 7 2

Calculate arithmetic mean.

In Calculation of Quartiles in Individual Series..what would be Q1 and Q3 of-X-12, 16, 17, 19, 21, 28, 30, 32

If the arithmetic mean of the data given below is 28, find (a) the missing frequency, and (b) the median of the series:

Profit per retail shop (in Rs)0 â€“ 10

10 â€“ 20

20 â€“ 30

30 â€“ 40

40 â€“ 50

50 â€“ 60

Number of retail shops12

18

27

â€“

17

6

why is the arithmetic mean the most commonly used of central tendency?

if mode is 63 and median is 77 calculate arithmetic mean.

0-4 2 4-8 4 8-12 7 12 - 16 5 16-20 8 20 -24 3 24 - 28 2 28 -32 1 32 - 36 13 36 - 40 5 40 -44 3 44 - 48 3 find the median . also use ogives

Calculate quartile deviation from the data given below.

X

20-30

30-40

40-50

50-60

60-70

F

4

6

8

6

4

how to calculate a in assume mean method formula

MARKS: 0-10 10-20 20-30 30-40 40-50

No of students: 10 20 30 20 10

what is quartile?

*design a project for the following title exploring the information relating to the topic ,prepare a questionnaire,collection of primary and secondary data and present them appropriately.Topic:designing eco friendly projects applicable in school such as paper and water cycle.

arithmetic mean is affected by very large and very small values , but median mode are not affected by them. explain

what is GATT?state any two functions WTO?

The algebraic sum of deviation of a set of n values from A.M. is

(a) n

(b) 0

(c) 1

(d) none of the above

X 1 2 3 4 5 6 7 8 9 10

f 2 581621 18 13 10 4 3

The Average marks in statistics of 10 students were 68. A new student with 72 marks where as 2 existing students left the college. If the marks of these students were 40 39, find the Average marks?

The mean annual salary paid to all employees of a company was Rs. 500.Mean annual salaries paid to male and female employees were Rs.520 and Sr.420.Determine the percentage of males and females employed?

Name 3 measures Of central tendency?

where r the textbook solution of stats of n.m.shah

Name two positional averages.