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Syllabus

Find the missing frequencies in the following frequency distribution whose mean is 50

X

10

30

50

70

90

Total

F

17

fi

32

F2

19

120

62 , 65 , 68 , 70 , 72 , 74 , 76 , 78 , 80 , 82 , 96 , 101,

find

a) the median,

b) the first quartile,

c) the third quartile,

d) the interquartile range (IQR).

what is the formula of mean , median , mode ?

_{1, }x_{2, }x_{3.....,}x_{n}are the means of n groups with n_{1 }n_{2 }n_{3}......,n_{n number of observations respectively, then find the mean x of all the groups taken together}what is class, class size, class interval and class marks????? plz plz plz answer fast......or else i will fail.......plz

what is the correct formula for adjusted frequency because wile doing the examples on meritnation the formula used was:-

Adjusted frequency= frequency/class size*minimum class size

whereas in the video regarding the histogram where adjusted frequency was used the formula applied there was:-

Adjusted frequency= minimum class size/class size*frequency

In a frequency distribution, the mid-value of a class is 20 and the width of the class is 8.then what is the lower limit ?

If mean of 5 observations x , x+2 , x+4 , x+6 , x+8 is 11.

Find the median of first three observations.

21. In the following groups of data, tell whether the mean or the median best describes the data:

(i) 6, 4, 2, 12, 2 (ii) 31, 28, 24, 9, 23 (iii) 45, 51, 47, 65, 36 (iv) 10, 20, 30, 100, 9

Plz help,

Find the missing frequencies f1 and f2 in the following frequeny distribution, if it is know that the mean of the distribution is 1.46

xi 0 1 2 345 total

fi 46 fi f2 25 10 5200

The mean of first 8 observations is 18 and last 8 observations is 20 . If the mean of all 15 observations is 19 , find the 8 th observation?

For a particular year following is the distribution of ages (in years) of primary school teachers in a district

Age (in years)

15-20

20-25

25-30

30-35

35-40

40-45

45-50

No. of teachers

10

30

50

50

30

6

4

1) 1) Write the lower limit of first class interval

2) 2) Determine the class limits of the fourth class interval

3) 3) Find the class mark of the class 45-50

4) Determine the class-size

the two consecutive class marks of a distribution are 52 and 57. find the class limits of two intervals

Xi 0 1 2 3 4 5

Xf 3 3 p 7 p-1 4

whats the difference between class interval, class size,class limit,class mark and also ranges,width and length of rectangle ?

The means of two groups of 15 and 20 observations are 20 and 25 respectively. Find the mean of all the 35 observations.

marks:number of students

100-150:60, 150-200:100, 200-300:100, 300-500:80, 500-800:180

draw a histogram

Find the value of p, if the mean of the following distribution is 20

x: 15 17 19 20+p 23

f: 2 3 4 5p 6

note : the method should be of sigma fixi.

(i) He scores more than 80% marks.

(ii) He scores less than 60%marks.

(iii) He scores more than or equal to 40 but less than 80

Class Interval Less than 40 40 - 60 60 - 80 80 -100

Frequency 610 840 750

how too find class marks ??explain with an example ??

wat is histogram , expalin with an example !?expain who to find scale with example !???a)95

b)25

c)70

d)60

Differentiate between class limits and true class limits.Give examples

There are 120 students in a class in which 20 of them are girls and rest are boys. The average marks in mathematics of the boys is 65% and that of is 80%, find the average marks of the class

what is the exact formula for ADJUSTED FREQUENCY??????????????

BECAUSE 2 VIDEOS OF THE SAME CHAPTER BUT OF OTHER LESSON SHOW DIFFERENT FORMULA SO WHICH ONE IS CORRECT.

The mean of 40 items is 35 and if each item is multiplied by ‘a’ then the new mean will be

(A) 35 a (B) 35 + a C) 40 D) 40 + a

how to make class intervals continuous?

^{th}observations.use of statistics in our daily life

_{i}x_{1}by sigma f_{i}?Help,

The mean of 25 observatios is 36. Out of thes,if the mean of first 13 observation is 32 and that of last 13 observation is 40,find the 13th observation.

the mean of 15 numbers is 27 .if each number is multiplied by 4,what will be the mean of the new number

find the mean median or mode:

2,3,4,5,0,1,3,3,4,3,

Mean of 50 observations was found to be 80.4. But later on it was discovered that 96 was misread as 69 at one place. Find the correct mean. If to each observation a constant value k is added, how is the mean affected?

find the mean median of first 12 odd composite numbers

Q. Find the mean and medium of the following numbers:

155, 160, 145, 149, 150, 147, 152, 144, 148.

if the ratio of mean and median of a certain data is 2:3 , then find the ratio of its mode and mean.

The following observation have been arranged in ascending order. if the median of the data is 63, find the value of x

29,32,48,50,x,x+2,72,84,95

Class size = Difference between class marks of two consecutive classes.= 52 - 47 = 5

Lower-class limit = class marks - 1/2 of class size= 47+2.5 = 49.5

Upper class limit = class marks + 1/2 of class size = 52+2.5 = 54.5

Since, the class-limits form a continuous frequency distribution; the true class limits and the class-limits are the

same

design a crossword puzzle using mathematical terms

153, 140, 148, 150, 154, 142, 146, 147.

Pls do not give any links.

the class marks of distribution are

47,52,57,62,67,72,77,82 determine the class size,class limit,ture class limits.

the mean of five numbers is 30. if one number is excluded, their mean becomes 28. the excluded number is:

Find the mean of factors of 24

In a frequency distribution,mid value of a class is 10 and width of class is 6. The lower limit of the class isthe mean of 16 numbers is 8. If 2 is added to every number, what will be the new mean ?

The marks obtained by 25 students in a class test of 100 marks is given below:

If x is the number of hours a labourer is on work "and y is his wages in rupees then y=4x+3. Draw the work wages graph of this equation . From the graph , Find the wages of a labourer Who puts in 4 hours of work.

the class mark of a distribution are :

37,42,47,52,57

determine the class size and class limits......

the mean of 5 number is 18 if one number is excluded, their mean is 16 .find the excluded number

the numbers 2,3,4,4,2x+1,5,5,6,7, are written in ascending order.if the median is 5,find x.hence find mode

how to convert the dis-continuous class into continuous class interval

Why is Mode, Mean, Median called as Measures of Central Tendency ?

Find the value of x and y in following distribution if it known that the mean of the distribution is 1.46

No. of students 0 1 2 3 4 5 Total

Frequency 46 x y 25 10 5 200

17,2,7,27,15,5,14,8,10,24,

48,10,8,7,18,28

the mean of 5 numbers is 7 if one more number is included the mean increases by 2. find the number included

Various modes of transport used by 1850 students of a school are given below

School bus

Private bus

Bicycle

Rickshaw

By foot

640

360

490

210

150

Draw a bar graph to represent the above data

if the mean of the observations x, x+3 ,x+5 ,x+7, and x+10 is 9. what is the mean of last three observations.

If x bar is the mean of x

_{1,}x_{2 ,}x_{3 ,}x_{4 ,}x_{5}_{then prove that }(x

_{1}-x bar)+(x_{2}-x bar)+(x_{3}-xbar)+(x_{4}-x bar)+(x_{5}-xbar)=010 observations 6, 14, 15, 7, x+1, 2x-13, 30, 32, 34, 43 are written in ascending order. The median of the data is 24. Find the value of x.

The mean of 12 numbers is 40. if each number is divided by 8 what will be the mean of the new number

If the mode of the following data is 14 , find the value of x.10, 12, 14, 15, 16, 14, 15,14, 15, x, 16, 14, 16.

what is adjusted frequency ? why is it used ? please explain in detail.

The mean of 200 numbers is 180.If each number is increased by 10,then what is the value of the new mean?

mean of 50 obs. was found to be 80.4 but later on it was found that 96 was misread as 69 at one place . find the correct mean

how to find the class size and class interval when the class marks are given.pls tell fast....

The mean of 20 numbers is 18. If 3 is added to each of the first ten numbers, find the mean of the new set of 20 numbers.

Give one example of a SITUATION where:

i. mean is an appropriate measure of central tendency.

ii. median is an appropriate measure of central tendency but mean is not.

The mean weight of 8 numbers is 15, if each number is multiplied by 2, what will be the new mean

The mean height of 10 students is 153 cm. It is discovered later on that while calculating, 151 was misread as 141 cm. Find the correct mean

find the mean of the following data by shortcut method

what is the mean of first five natural numbers

on monday i have exam of maths so pls answer it fast as possible

needed urgently

The mean 20 observation is 25. In each observation is multiplied by 2. What is the new mean of Observation?????/

The mean of 200 items was 50. Later on it was discovered that 2 items were misread as 92 and 8 instead of 192 and 88. Find the correct mean.

how to calculate minimum class size?