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Syllabus

formula of mode-economics 11th

The most suitable average for qualitative measurement is

(a) arithmetic mean

(b) median

(c) mode

(d) geometric mean

(e) none of the above

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

Age

80-89 70-79 60-69 50-59 40-49 30-39 20-29 10-19

Years

Frequency 2 2 6 20 56 40 42 32

Calculate mean age of the persons by Direct Method.

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

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 .

Comment whether the following statements are true or false.

(i) The sum of deviation of items from median is zero.

(ii) An average alone is not enough to compare series.

(iii) Arithmetic mean is a positional value.

(iv) Upper quartile is the lowest value of top 25% of items.

(v) Median is unduly affected by extreme observations.

sandeep garg satistics problem solution 11th

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

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

(a) median

(b) mode

(c) arithmetic mean

(d) none of the above

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

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

Calculate median from the following series:

Class Interval

10-20

20-40

40-70

70-120

120-140

Frequency

4

10

26

8

2

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

The following data-set gives mid-values and frequencies. Calculate its mode.

Mid-value

frequncy

5

7

10

13

15

19

20

24

25

32

30

28

35

17

40

8

45

6

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

class interval : 10-20 20-40 40-70 70-120 120-200

frequency :4 10 26 8 2

total : 50

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.

mid value 10 12 14 16 18 20 frequency 5 8 12 20 10 5

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 is mean by mean,median and mode

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

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

Q. Marks secured by 42 students in Economics are:

Q. Average age of the people of a country is shown in the following table:

Q. Calculate the arithmetic mean of the following frequency distribution by Direct Method:

show the relationship between mean ,median ,mode ?

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.

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

how can we measure mean in case of open end series

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

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.

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

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 – 10

10 – 20

20 – 30

30 – 40

40 – 50

50 – 60

Number of retail shops12

18

27

–

17

6

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

(a) Simple arithmetic means

(b) Weighted arithmetic mean

(c) Median

(d) Mode

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

how to calculate a in assume mean method formula

what is quartile?

(Ans: X = 13)arithmetic mean is affected by very large and very small values , but median mode are not affected by them. explain

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

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

Marks

4 5 6 7 8

Number of Students

12 10 18 20 24

Calculate arithmetic mean using Direct

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

probable value of mode.

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?

It is of accountancy subject.

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

The size of land holdings of 380 families in a village is given below. Find the median size of land holdings.

Size of Land Holdings (in acres)Less than 100

100 – 200

200 – 300

300 – 400

400 and above

Number of families40

89

148

64

39

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

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?

10. Calculate mode in the following distribution using grouping method:-

Name 3 measures Of central tendency?

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

Name two positional averages.