Chapter Content type Value Position Created at
Chapter 13 - Mathematics text 272 MATHEMATICS non-negative. Let x , 1 ,2x ,3..., xnbe n... 32 Delete Content
Chapter 13 - Mathematics image /default_org/ncert_images/class-xi/ma... 33 Delete Content
Chapter 13 - Mathematics text STATISTICS 273 n 2 If ∑ (x i x) is simply our measure of ... 34 Delete Content
Chapter 13 - Mathematics image /default_org/ncert_images/class-xi/ma... 35 Delete Content
Chapter 13 - Mathematics text 274 MATHEMATICS 2 1 n 2 σ = ∑ (xi− x) n i=1 13.5.1 Standa... 36 Delete Content
Chapter 13 - Mathematics image /default_org/ncert_images/class-xi/ma... 37 Delete Content
Chapter 13 - Mathematics text STATISTICS 275 n ∑ d i Therefore Mean x = assumed mean + ... 38 Delete Content
Chapter 13 - Mathematics image /default_org/ncert_images/class-xi/ma... 39 Delete Content
Chapter 13 - Mathematics text 276 MATHEMATICS 7 7 N = 30, ∑ i i = 420, ∑ i(x i x )2 =13... 40 Delete Content
Chapter 13 - Mathematics image /default_org/ncert_images/class-xi/ma... 41 Delete Content
Chapter 13 - Mathematics text STATISTICS 277 1 n 2 2  1 n n  = i i + x N 2 .N x Here... 42 Delete Content
Chapter 13 - Mathematics image /default_org/ncert_images/class-xi/ma... 43 Delete Content
Chapter 13 - Mathematics text 278 MATHEMATICS 1 7 3100 Thus Mean x = ∑ fi i= = 62 N i=1... 44 Delete Content
Chapter 13 - Mathematics image /default_org/ncert_images/class-xi/ma... 45 Delete Content
Chapter 13 - Mathematics text STATISTICS 279 1 = ×293.77 = 6.12 48 Therefore, Standard ... 46 Delete Content
Chapter 13 - Mathematics image /default_org/ncert_images/class-xi/ma... 47 Delete Content
Chapter 13 - Mathematics text 280 MATHEMATICS n 1 f h (y − y)2 = N ∑ i i i=1 2 n h f (y... 48 Delete Content
Chapter 13 - Mathematics image /default_org/ncert_images/class-xi/ma... 49 Delete Content
Chapter 13 - Mathematics text STATISTICS 281 ∑ i i 15 Therefore x= A + 50 ×h =65 − 50 ×... 50 Delete Content
Chapter 13 - Mathematics image /default_org/ncert_images/class-xi/ma... 51 Delete Content
Chapter 13 - Mathematics text 282 MATHEMATICS 8. Classes 0-10 10-20 20-30 30-40 40-50 F... 52 Delete Content
Chapter 13 - Mathematics text STATISTICS 283 1 20 1 20 1 20 Therefore y = ∑ y i= ∑ 2x i... 54 Delete Content
Chapter 13 - Mathematics image /default_org/ncert_images/class-xi/ma... 55 Delete Content
Chapter 13 - Mathematics text 284 MATHEMATICS x + y – 2xy = 97 – 72 i.e. (x – y) = 252 ... 56 Delete Content
Chapter 13 - Mathematics image /default_org/ncert_images/class-xi/ma... 57 Delete Content