Math, asked by Adnanshams1010, 9 months ago

1 From the following cumulative frequency table, write the frequency of the class interval 20 - 30
Marks
Less than 10
Less than 20
less than 30
Less than 40
Less than 50
No. of students
2
15
85​

Answers

Answered by pulakmath007
23

SOLUTION

TO DETERMINE

From the following cumulative frequency table, write the frequency of the class interval 20 - 30

 \sf{Marks  \:  \:  \:  \:   \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: \:  \: Number  \: of \:  Students}

 \sf{Less \:  than \:  10 \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:   \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: \: 2}

 \sf{Less \:  than \:  20 \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:   \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: 15}

 \sf{Less \:  than \:  30 \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:   \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: 40}

 \sf{Less \:  than \:  40 \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:   \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: 71}

 \sf{Less \:  than \: 50 \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:   \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: 85}

EVALUATION

The ordinary frequency table will be as below

 \sf{Class \:  Interval  \:  \:  \:  \:  \:  \:  \:  \:  \: Frequency  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: C.F. \:  (< )}

 \sf{ \:  \:  \:  \:  \:  \: 0 - 10 \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:   \:  \:  \:  \:  \:  \:  \:  \:  \:  \:   \: 2 \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:    \:  \:  \:  \:  \: 2}

 \sf{ \:  \:  \:  \:  \:  10 - 20 \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  15 -  2 = 13 \:  \:  \:  \:  \:  \:  \:  \:  \: \:  \:  \:  \:  \:   \:  15}

 \sf{ \:  \:  \:  \:  \:  20 - 30 \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  40 -  15 = 25 \:  \:  \:  \:  \:  \:  \:  \:  \: \:  \:  \:  \: \: 40}

 \sf{ \:  \:  \:  \:  \: 30 - 40 \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  71 -    40 = 31 \:  \:  \:  \:  \:  \:  \:  \:  \: \:  \:  \:  \:  \:   \: 71}

 \sf{ \:  \:  \:  \:  \:  40 - 50 \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  85 -  71 = 14 \:  \:  \:  \:  \:  \:  \:  \:  \: \:  \:  \:  \:  \:   \:  85}

Hence the frequency of the class interval

20 - 30 is 25

━━━━━━━━━━━━━━━━

Learn more from Brainly :-

1. 4. Frequency density corresponding to a

class interval is the ratio of

a) Class frequency to the total frequency

https://brainly.in/question/14986189

2. If the regression coefficient byx is 0.5, what is the value of a in the given equation: 2Y = aX –16.80

https://brainly.in/question/29130013

Similar questions