Statistics

Formulas are organized based on their importance in the CAT exam.
1 Coefficient of Variation
2 Standard Deviation Under Scaling
3 Mean Deviation for Frequency Distribution
4 Standard Deviation of Discrete Random Variable
5 Discrete Frequency Distribution
6 Third Quartile
7 Karl Pearson's Alternative Formula
8 Negatively Skewed Distribution
9 Total Frequency
10 Mean of Consecutive Integers
11 Variance Using Mean of Squares
12 Mean of Ungrouped Data
13 Quartile Deviation
14 Standard Deviation of Ungrouped Data
15 Mean of Discrete Random Variable
16 Median Position
17 Deciles
18 Mode for Grouped Data (Continuous)
19 Variance of First n Natural Numbers
20 Standard Deviation of Two Observations
21 Variance of Ungrouped Data
22 Variance
23 Frequency Form of Standard Deviation
24 Mean Under Linear Transformation
25 Observation
26 Standard Deviation of Grouped Data
27 Class Width
28 Assumed Mean
29 Sum of Frequency-Weighted Observations
30 Five-Number Summary
31 Mean After Multiplication
32 Standard Deviation After Repetition
33 Karl Pearson's Coefficient of Skewness
34 Percentiles
35 Mean After Repetition
36 Combined Variance of Two Sets
37 Variance of Grouped Data
38 Variance of a Dataset After Repetition
39 Mean of an Arithmetic Progression
40 Median of Grouped Data
41 Mean Deviation About Mean for Frequency Data
42 Mean Deviation About Median for Frequency Data
43 Variance of First n Odd Numbers
44 Variance After Division
45 Standard Deviation After Multiplication
46 Variance Under Linear Transformation
47 Quartiles as Percentiles
48 Standard Deviation by Step-Deviation
49 Coefficient of Range
50 Variance of Two Observations
51 Mean After Division
52 Symmetric Data
53 Symmetry and Mean Deviation
54 More-Than Cumulative Frequency
55 Weighted Mean
56 Median Class
57 Minimum Sum of Squared Deviations
58 Relation Between Range and Standard Deviation
59 Standard Deviation of First n Natural Numbers
60 Relative Dispersion
61 Variance Under Translation
62 Variance of First n Even Numbers
63 Mean of Grouped Data
64 Median for Grouped Data (Continuous)
65 Mean Deviation
66 Mean of Two Groups
67 Corrected Variance
68 Symmetric Distribution
69 Combined Mean of Multiple Groups
70 Removing One Observation
71 Positively Skewed Distribution
72 Cumulative Frequency
73 Missing Observation from Variance
74 Percentile for Grouped Data
75 Terminology in Percentile Formula
76 Quartile Formula for Grouped Data
77 Minimum Mean Deviation Property
78 Assumed Mean Method for Variance
79 Step-Deviation Method for Variance
80 Mean Deviation Under Linear Transformation
81 Standard Deviation After Division
82 Variance under Linear Transformation
83 Arithmetic Mean
84 Equivalent Empirical Relation
85 Standard Deviation of First n Odd Numbers
86 Combined Variance of Multiple Groups
87 Variance of an Arithmetic Progression
88 Variance of First n Natural Numbers
89 Variance of an Arithmetic Progression
90 Missing Observation from Mean
91 Incorrect Observation Correction
92 Quartile Positions for Ungrouped Data
93 Data
94 Step-Deviation
95 Second Quartile
96 Frequency Form of Variance
97 Mean by Assumed Mean Method
98 Range
99 Skewness
100 Coefficient of Variation
101 Less-Than Cumulative Frequency
102 Relation Between IQR and Quartile Deviation
103 Frequency Form of Deviation Property
104 Direct Method for Mean
105 Percentile Position
106 Class Interval
107 Interquartile Range
108 Lower Class Boundary
109 Corrected Sum of Squares
110 Number of Observations
111 Standard Deviation
112 Grouped Data
113 Class Mark
114 Property of Arithmetic Mean
115 Median for Even Number of Observations
116 Median of a Frequency Distribution
117 Terminology in Grouped Median Formula
118 Terminology in Grouped Mode Formula
119 Empirical Relation Between Mean, Median and Mode
120 Quartiles
121 Comparison of Consistency
122 Within-Group and Between-Group Variance
123 Variance After Multiplication
124 Variance After Subtracting a Constant
125 Transformation of Mean and Variance
126 Upper Class Boundary
127 Median for Odd Number of Observations
128 Mean of First $$n$$ Even Natural Numbers
129 Mode of Grouped Data
130 Mean of Frequency Distribution
131 Frequency
132 Mean of Grouped Data
133 Mean of First $$n$$ Odd Natural Numbers
134 Standard Deviation of a Constant
135 Removing One Observation: Sum of Squares
136 Statistics
137 Adding One Observation
138 Variance After Adding a Constant
139 Mean Deviation About Median
140 Combined Variance of Two Groups
141 Mean Using Summation Notation
142 Mode
143 Standard Deviation of an Arithmetic Progression
144 Modal Class
145 Mean of First $$n$$ Natural Numbers
146 Variance Under Scaling
147 Standard Deviation of First n Even Numbers
148 Combined Standard Deviation
149 Median
150 Variance of a Constant
151 Mean of Two Numbers
152 Minimum Variance Property
153 Mean After Adding a Constant
154 Sum of Squared Deviations from Mean
155 Mean Deviation About Mean
156 Standard Deviation Under Linear Transformation
157 Adding One Observation: Sum of Squares
158 Transformation of Mean and Standard Deviation
159 Sum of Observations from Mean
160 Coefficient of Quartile Deviation
161 First Quartile
162 Variance of Discrete Random Variable
163 Relation Between Mean, Median and Mode
164 Coefficient of Variation and Consistency
165 Mean by Step-Deviation Method