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A simple student.


1d
comment Derivation of formula for finding median for grouped data
@Rahul: $L_m$ is the lower limit of the median class, $n$ is the total number of observations, $F_{m-1}$ is the cumulative frequency of the class preceding the median class, $f_m$ is the frequency of the median class, $c$ is the class width.
Jul
22
comment How can I find the median of this frequency distribution
I have also seen that the formula for median is sometimes given by letting $x=n/2$ in the above equation instead of $x=(n+1)/2$. Can you explain that?
Jul
2
awarded  Curious
Jul
2
awarded  Inquisitive
May
27
awarded  Popular Question
May
20
asked Newton's differential equation
May
17
comment $\lim_{x\to 2} \, \sqrt{x-2}$
In the real case note that the definition of limit of a function at a given point $x_0$ requires that there is an open interval containing $x_0$ such that the function is defined everywhere in $(a,b)$ except possibly at $x_0$. In your case there is no open interval containing $2$ where the function is defined. So the concept of limit existing is itself moot.
May
17
reviewed Approve suggested edit on Inequality of differential equation implies inequality of functions.
May
14
reviewed Approve suggested edit on Given two series $ x_n $ and $ y_n $
May
13
reviewed Approve suggested edit on $\operatorname{Span}(T) = \operatorname{Span}(T - \{v\})$
May
11
reviewed Approve suggested edit on Reduction Formula without Partial Fractions
May
10
reviewed Approve suggested edit on Solution to $1-f(x) = f(-x)$
May
10
reviewed Approve suggested edit on What is the upper bound for $\frac1n$ where $n$ is a prime?
May
7
reviewed Approve suggested edit on Demystify / Solve a number progression.
May
6
comment Ok, I know what does linear independence mean but why should I care?
The two most difficult questions in mathematics are: So what? and who cares?
May
6
awarded  Yearling
Apr
28
asked Discrete and Continuous analogues
Apr
23
comment Studies on lack of mathematical education
@AsafKaragila: Can you do that please?
Mar
27
reviewed Approve suggested edit on Finding concavity:$ f'(x)=2\cos x+\sin2x$
Mar
26
awarded  Popular Question