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CBSE Class 10 Answered

sir can you please explain me the difference between step diviation method and short cut method
Asked by Megha | 18 Jun, 2014, 02:59: PM
answered-by-expert Expert Answer
I f space t h e space v a l u e s space o f space x space o r space left parenthesis a n d right parenthesis space f space a r e space l a r g e comma space t h e space c a l c u l a t i o n s space o f space a r i t h m e t i c space m e a n space b y space t h e space d i r e c t space m e t h o d space i s space t i m e space c o n s u m i n g. T h e r e f o r e space t o space r e d u c e space t h e space c a l c u l a t i o n s space i n v o l v e d comma space a n d space t o space r e d u c e space t h e space t i m e space i n space d o i n g space t h a t space c a l c u l a t i o n s comma space w e space t a k e space d e v i a t i o n s f r o m space a n space a r b i t r a r y space p o i n t. S h o r t space c u t space m e t h o d : T a k e space a n space a r b i t r a r y space p o i n t space a s space a s s u m e d space m e a n comma space s a y space A. S t e p space 1 : space C o n s t r u c t space t h e space f r e q u e n c y space t a b l e space s u c h space t h a t space i t s space f i r s t space c o l u m n space c o n s i s t s space o f space t h e space v a l u e s space o f space t h e space v a r i a b l e space a n d space t h e s e c o n d space c o l u m n space c o n s i s t s space o f space t h e space c o r r e s p o n d i n g space f r e q u e n c i e s S t e p space 2 : space S e l e c t space a space n u m b e r space apostrophe A apostrophe space a n d space f i n d space d e v i a t i o n s space d subscript i equals x subscript i minus A space a n d space w r i t e space t h e s e space d e v i a t i o n s space i n space t h e space t h i r d space c o l u m n. S t e p space 3 : space F i n d space t h e space p r o d u c t space o f space t h e space f r e q u e n c i e s space w i t h space t h e space d e v i a t i o n s space a n d space w r i t e space t h e m space i n space t h e space f o u r t h space c o l u m n. S t e p space 4 : space O b t a i n space t h e space s u m space o f space t h e space e n t r i e s space i n space t h e space t h i r d space c o l u m n space a n d space t h e space s u m space o f space t h e space f r e q u e n c i e s space i n space t h e space s e c o n d space c o l u m n. S t e p space 5 : space U s e space t h e space f o r m u l a space top enclose X equals A plus 1 over N open parentheses stack sum f subscript i d subscript i with i equals 1 below and n on top close parentheses Answered by Vimala Ramamurthy | 19 Jun, 2014, 01:01: PM

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CBSE 10 - Maths
find the mean of 20 numbers such that if the mean of 8 of them is 10 and the mean of 10 of them is 12 the last two numbers are 8 and 12
Asked by amulya2194 | 17 Apr, 2022, 04:46: PM
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CBSE 10 - Maths
9.If the mean of the following data is 91.Find the missing frequency :- C. I.            Frequency 0-30.             12 30-60.           21 60-90.            X  90-120.         52 120-150.        Y  150-180.        11 Total              150
Asked by prajapatisohil573 | 02 Aug, 2021, 10:03: AM
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CBSE 10 - Maths
by assume mean method
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Asked by 8416mayankkumar | 14 Mar, 2021, 07:35: PM
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CBSE 10 - Maths
Statistics
Asked by Tesbthmarak | 05 Mar, 2021, 09:46: PM
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CBSE 10 - Maths
solve
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Asked by singhshrey918 | 29 Dec, 2020, 10:23: PM
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CBSE 10 - Maths
what is statistics
Asked by srilakshmikonakanchi91 | 15 Oct, 2020, 09:12: PM
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CBSE 10 - Maths
assumed mean method
Asked by rituparn69 | 27 Sep, 2020, 10:59: PM
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CBSE 10 - Maths
Write formula for find out the mean of the data using assumed mean
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Asked by baladh676 | 04 Sep, 2020, 03:04: PM
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CBSE 10 - Maths
Mean of 100 numbers was found to be 50. But later on, it was observed that one of the number 150 was wrongly taken as 50
Asked by samarpreetsingh076 | 01 Sep, 2020, 08:07: AM
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CBSE 10 - Maths
The arithmetic mean of the following frequency distribution is 50 .C.I  0-10 ,10-20, 20-30, 30-40,40-50.frequency:    16      p           30        32     14. Find the value of p  
Asked by Anilkumardelhi73 | 13 Jun, 2020, 10:13: PM
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