State true or false.

The mean of the following data using step-deviation method is 544.

Class	Frequency
500-520	14
520-540	9
540-560	5
560-580	4
580-600	3
600-620	5

Class

Frequency

500-520

14

520-540

9

540-560

5

560-580

4

580-600

3

600-620

5

Class

Frequency, $f_i$

Mid-value, $x_i$

$u_i$=$\frac{x_i-A}{h}$=$\frac{x_i-550}{20}$

$f_i{u}_i$

500-520

14

510

-2

-28

520-540

9

530

-1

-9

540-560

5

550=A

0

0

560-580

4

570

1

4

580-600

3

590

2

6

600-620

5

610

3

15

Σ$f_i$=40

Σ$f_i{u}_i$=-12