Question

all the formula of statistics class 10 ​

Answer 1

Answer:

Statistics Formula Sheet

The important statistics formulas are listed in the chart below:

Mean x¯=∑xn x = Observations given

n = Total number of observations

Median If n is odd, then

M = (n+12)th term

If n is even, then

M = (n2)thterm+(n2+1)thterm2 n = Total number of observations

Mode The value which occurs most frequently

Variance σ2 = ∑(x−x¯)2n x = Observations given

x¯ = Mean

n = Total number of observations

Standard Deviation S=σ=∑(x−x¯)2n−−−−−−√ x = Observations given

x¯ = Mean

n = Total number of observations

Answer 2

Answer:

Step-by-step explanation:

UNGROUPED DATA:

Mean= ∑fixi÷∑fi

VMedian= if n is odd,

Value of (n+1÷2)th observation

If n is even,

(Value of(n÷2)th observation +value of (n÷2+1)th observation)÷2

GROUPED DATA:

Mode= l+(f1-f0÷2*f1-f0-f2)*h

Median = l+((N÷2)-Cf÷f)*h

Mean:

By direct method = ∑fixi÷∑fi

By assumed method = a+∑fidi÷∑fi

By step deviation method = a+(∑fi*ui÷∑fi)*h

These are the formulae in statistics class 10

For mode ungrouped data, it is the most number of times repeated observation