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Syllabus

1.Find the missing frequency f, if the mode of the given data is 154.

Classes

120-130

130-140

140-150

150-160

160-170

170-180

Frequency

2

8

12

f

9

7

plzz give an answer fast....

what is hit and trial method .

In the following frequency distribution the weekly Median cost of living Index is 1755. If total number of weeks is 52 then find the missing frequencies

. cost of living Index 1500-1600 1600-1700 1700- 1800 1800-1900 1900-2000 2000-2100 2100-2200

NO of weeks 4 x y 8 4 3 2

If the median of the distribution is given below is 28.5, find the values of

xandy.Class intervalFrequency0 − 10

5

10 − 20

x20 − 30

20

30 − 40

15

40 − 50

y50 − 60

5

Total

60

Find the median of the following data.

Wages ( in rupees ) :More than 150 , More than 140 , More than 130 , More than 120 , More than 110 , More than 100 , More than 90 . More than 80.No.of workers : NIL ,12,27,60,105,124,141,150.if the median of the following frequency distribution is 24. find the missing frequency x :

Age Number of persons

0 - 10 5

10 - 20 25

20 - 30 x

30 - 40 18

40 - 50 7

Marks Below 10 Below 20 Below 30 Below 40 Below 50 Below 60 Below 70 Below 80 Below 90 Below 100

No. of students 5 9 17 29 45 60 70 78 83 85

find the missing frequencies if N=100 and median is 32.

marks obtained-0-10, 10-20, 20-30, 30-40, 40-50, 50-60, total

no. of students-10 ,? ,25 ,30 ,? ,10 ,100.

class 0-20 20-40 40-60 60-80 80-100 100-120

frequency14 x 24 32

10 2

The median of the following distribution is 30. Find the missing frequencies f1 and f2:

Class frequency

0-10 10

10-20 10

20-30 f1

30-40 30

40-50 f2

50-60 10

Total 100

(In subject logical reasoning is not showing)

the mean of 10 numbers is 20.if 5 is subtracted from every number.what will be the new mean?

how to calculate mode if two classes have same and highest frequency (bimodal) ?

how to find the mean if the class intervals are unequal??

like fr e- 0-10,10-30,30-35....

The mean of 25 observations is 9 . if each observation is increased by 4 then the new mean is _______

compare the performance of two teams for one day cricket match statistically .

(1) performance of both teams to commulative scores.

(2) investigate the interval in which run rate was slow ,fast and average with all the wickets.

(3) compare the performance of individual players

how to find xi?

In the step deviation method,

What is the meaning of

u_{i }?What is the formula to use median when more than ogive is given?

the algebraic sum of the deviations of a frequency distribution from its mean is..

a. always+ve

b. always-ve

c. 0

d. a non-zero number..

plz answer....and also giv de reason for ur answer..plz!!!!

median.

Classes 20-30 30-40 40-50 50-60 60-70 70-80 80-90

frequency 10 8 12 24 6 25 15

A class teacher has the following absentee record of 40 students of a class for the whole term. Find the mean number of days a student was absent.

Number of days0 − 6

6 − 10

10 − 14

14 − 20

20 − 28

28 − 38

38 − 40

Number of students11

10

7

4

4

3

1

1 mode

2 median

3 mean

4 all of these

3 Median = Mode + 2 Mean

please proof it.

(in years)

(A)

(B)

Find the modal age of employees in factory A and B.

In a continuous frequency distribution, the median of the data is 21.If each observation is increased by 5 find the new median

Find the mean number of pages written per day.

The mean and median of same data are 24 and 26 respectively. The value of mode is ?

marks number of students

0 and above 80

10 and above 77

20 and above 72

30 and above 65

40 and above 55

50 and above 43

60 and above 28

70 and above 16

80 and above 10

90 and above 8

100 and above 0

CLASSFREQUENCY>20 50

>30 44

>40 28

>50 20

>60 15

The following distribution gives the daily income of 50 workers of a factory.

Daily income (in Rs)100 − 120

120 − 140

140 − 160

160 − 180

180 − 200

Number of workers12

14

8

6

10

Convert the distribution above to a less than type cumulative frequency distribution, and draw its ogive.

If the class marks of a continuous frequency distribution are 12,14,16,18,........., then find the class intervals corresponding to the class marks 16 and 22.

the mean of first n odd natural numbers is n2/81,then n=

In an arranged series of an even number of 2n terms the median is__________

Find the value of f1 from the following data if it's mode is 65:

Class frequency

0-20 6

20-40 8

40-60 f1

60-80 12

80-100 6

100-120 5

Where frequency 6,8, f1, and 12 are in ascending order.

marks obtained no of students

less than 10 14

less than 20 22

less than 30 37

less than 40 58

less than 50 67

less than 60 75

The mean of n observations is X . IF the first item is increased by 1, second by 2 and so on, then the new mean is:

1. X+n

2. X+n/2

3. X+(n+1)/2

4. X+(n-1)/2

Wages (in Rs) No. of Workers

0 - 30 10

30 - 40 15

40 - 50 30

50 - 60 32

60 - 70 8

70- 80 5

if the mean of the following frequency distribution is 91, find the missing frequency x and y :

classes frequency

0 - 30 12

30-60 21

60 - 90 x

90 -120 52

120 - 150 y

150 - 180 11

total 150

how do we find mean using step deviation method if the classes are unequal?

should we make the classes equal in such a case?

A set of number consists of four 5s, six 7s, ten 9s, eleven 12s, three 13s and two 14s. Find the mode of the this set of numbers.

class frequency

40-50 5

50-60 x

60-70 15

70-80 2

80-90 7

During the medical check-up of 35 students of a class, their weights were recorded as follows:

Weight (in kg)Number of studentsLess than 38

0

Less than 40

3

Less than 42

5

Less than 44

9

Less than 46

14

Less than 48

28

Less than 50

32

Less than 52

35

Draw a less than type ogive for the given data. Hence obtain the median weight from the graph verify the result by using the formula.

the interest paid on each of the three different sums of money yeilding 1%, 2% and 4% simple interest per annum respectively, is the same. find the average yield percent on the total sum inverted.

Class interval Frequency0-10 10

10-20 20

20-30 x

30-40 40

40-50 y

50-60 25

60-70 15

If the less than ogive and more than ogive intersect each other at ( 20.5,15.5 ), then the median of the given data is :

A ) 36.0 B) 20.5 C ) 15.5 D ) 5.5

Class Interval Frequency

160-162 15

163-165 118

166-168 142

169-171 127

172-174 18

Find the sum of deviations of the variate values 3, 4, 6, 7, 8, 14 from

their mean.

7. Write the relationship connecting three measures of central tendency. Hence find mode when mean is 146 and median is 130 .

Class interval Frequency10-20 12

20-30 30

30-40 f1

40-50 65

50-60 f2

60-70 25

70-80 18

no links plz.

the median of the data is 525. find x and y, if total frequency is 100

class 0-100 100-200 200-300 300-400 400-500 500-600 600-700 700-800 800-900 900-1000

frequeency 2 5 x 12 17 20 y 9 7 4

9. If the mean of the distribution is 57.6 and the sum of its observations is 50, find the missing

The mean of the following frequency dristibution is 50. Find the value of

ppthe average marks of a,b,c is 33 while the average marks of b,c,d is 37. if a obtain 30 marks find the marks obatined by d

In a school 85 boys and 35 girls appeared in a public examination . The mean marks of the boys were found to be 40 % whereas the mean marks of the girls were 60% . Determine the average marks % of the school.

family size:0-4,4-8,8-12,12-16,16-20

number of families:8,14,12,4,2

find median and mode.

how can we find the median by only less than ogive curve?

The median of the following data is 32.5.find the value of x and y

class interval f

0-10 x

10-20 5

20-30 9

30-40 12

40-50 y

50-603

60-70 2

total 40

The following table shows the marks obtained by 100 students of class X in a school during a particular academic session. Find the mode of this distribution.

Marks No. of studentsLess than 10 7

Less than 20 21

Less than 30 34

Less than 40 46

Less than 50 66

Less than 60 77

Less than 70 92

Less than 80 100

1.If the mode of the following frequency distribution is 57.5, find the value of xx

30-40

40-50

50-60

60-70

70-80

80-90

90-100

f

6

10

16

x

10

5

2

Find the mean, mode and median for the following data.

weight = 50-52 52-54 54-56 56-58 58-60 60-62 62-64

no.of students = 18 21 17 28 16 35 15

by step deviation method.

The median of the following data is 20.75. Find the missing frequencies x and y, if the total frequency is 100.

Class interval:-0-5 5-10 10-15 15-20 20-25 25-30 30-35 35-40

Frequencies: -7 10 x 13 y 10 14 9

the age of employees in a factory are as follows: 17-23....2, 23-29.....5, 29-35....6, 35-41.....4, 41-17......2, 47-53.....1.Find the median age group of employees.how to find the median class?

Q. Find the mean of the following distribution :

A teacher asked the students to collect the marks of the students in maths periodic test out of 50 marks a student collected the marks and prepare the frequency distribution table as per the instructions of the teacher from the frequency table again student prepare less than cf distribution and then he draws less than ogive as shown in above right sided figure construct the frequency distribution table using the less than ogive and then find the median marks

Can you please help me to solve this question. Please don't give similar answer

How to find missing frequency if the mode of the given data is given.

How to convert a

LESS THAN OGIVEand it'sCFinto the Frequency distribution?class 5-15 5-25 25-35 35-45 45-55

fq 3 p 15 11 6

Find the class marks of classes 10 - 25 and 35 - 55.0-10. 4

10-20. 16

20-30. a

30-40. b

40-50. c

50-60. 6

60-70. 4

TOTAL. 230

If the mean of the following distributions is 27, Find the value of p

The mean of the following data is 53, find the missing frequencies.

age in years -- 0-20, 20-40 40-60 60-80, 80-100

number of people--- 15, f1, 21, f2, 17, 100

the class mark of classes in a distribution arer 6.10.14.18.22.26.30. find

a) class size

b) lower limit of second class

c) upper lmit of last class

d) third class

…………………. Is called a positional average.

Total = 50

height in cm frequency cumulative frequency

150-155 12 a

155-160 b 25

160-165 10 c

165-170 d 43

170-175 e 48

175-180 2 f

If the curves for more than ogive and less than ogive of a given grouped data meet at (30,45), then what is the median of the data?