Question

if x bar is 12.2 and Sigma fi is 100 ,then Sigma fidi is __​

Answer 1

Answer:1220 units

Step-by-step explanation: x bar=12.2. Sigma fi =100. Sigma fidi=x bar ×sigma fi

=12.2×100.

=1220units

Answer 2

Answer:

The value of sigma f_{i}d_{i}f

i

d

i

is 1220

Mean is one of the common measures of central tendency.

It is the ratio of sum of observations to number of observations.

When dealing with unequally weighted variables, its formula is given as follows

Mean=\frac{sigma(f_{i}d_{i})}{sigma(f_{i})}Mean=

sigma(f

i

)

sigma(f

i

d

i

)

Given,

mean = 12.2

sigma(f_{i})=100sigma(f

i

)=100

sigma(f_{i}d_{i})=?sigma(f

i

d

i

)=?

12.2=\frac{sigma(f_{i}d_{i})}{100}12.2=

100

sigma(f

i

d

i

)

(12.2)(100)=sigma(f_{i}d_{i})(12.2)(100)=sigma(f

i

d

i

)

(1220)=sigma(f_{i}d_{i})(1220)=sigma(f

i

d

i

)

sigma(f_{i}d_{i})=1220sigma(f

i

d

i

)=1220

Therefore, the value of sigma(f_{i}d_{i})sigma(f

i

d

i

) is 1220