In my stat function, instead of L1, L2 and L3 columns appearing consecutively,only L4 (first) to L11 is appearing. how do i change it to L1 and so on

L1, L2, L3?
If you are doing statistics, Set MODE to 3. Stat.
Choose 1-Var or any regression model. If you press 1-var you will have two lists x and frequency.
For any regression model you have 3 lists x, y, and Freq(uency).
L1, L2, L3, are list names in the TI 83/84 Plus and the Casio graphing calculators.
I hope it helps

Put the frequencies into the list LFREQ instead of L2.

I have followed your description and entered bogus data in Lists L1, L2, and L3.
I hit STAT then CALC then Option 1, which is 1-Var Stats. In this context you have only one set of data. If the data set contains many repeated values you can enter the frequency for each (repeated) data item in List L2, inserting 1 if an item is not repeated.
Thus when you do 1-Var Statistics you have at most two Lists (L1 contains the data values, and L2 their frequencies).
If you press the 1-Var Stats calculation option, the calculator takes L1 as the default data list so you see List:L1 and the ALPHA cursor blinking
On the secoond line you see Frequency: and nothing else on the line.
On the third line you have Calculate.
If Your data is not in L1, you can change that by pressing the [2nd][2] (L2), or [2nd][3] (L3). Only one list is specified there, so no need for the comma to separate. (you are doing 1-var Stat).

If your frequency data is in L2 you must specify it on the line Frequency. However, since the ALPHA keyboard is activated you must deactivate it first by pressing the ALPHA key. After that press [2nd][2] to select L2 or [2nd][3] to specify L3
If there is no frequency list, leave the Line frequency empty.

Press STAT key. In the list of options that are displayed under the leftmost menu (EDIT) , press the 5:SetUpEditor. Press ENTER. It will restore the deleted list L1

Each "list" has to have a name. Usually, the lists are named L1, L2, L3, L4, L5, L6 ect. but you can give them text names as well.
To name the list, go to Stat--> Edit --> Input a name--> Enter To input a name, either do 2nd --> L1,L2,L3 ect.. or use Alpha --> Name

Scroll to the blank sport (hit the left/right key a couple times) and then type in the missing list names.
So where the _ _ _ _ _ is hit 2nd then 1 for your L1, 2nd then 2 for your L2 and so on

There is no L7 list. You can put your data in any available list. You can even create your own lists.
Anyway, to recover the L1,L2,L3, and L4,
Press [STAT][5:SetUpEdidor] [ENTER]
Calculator displays Done.

Press [STAT]. Under Menu EDIT, Press [1:Edit]
The List editor opens the L1,L2, etc. liststo let you enter your data.

Just put in series after the switch before the wirings
go to the electric motor. Put the two electrical wires
to L1 and L2 (Line In). L1 must be with normally closed ontact L3 while L2 must be with L4. (L3 and L4 - is Line out) for the motor terminal wires. Before connecting wires at L3 and L4, Check for continuity at L3 and L4. Set the muti tester at 1 x 10 Ohms..Then put the multi tester probe on it. The reading must be infinity or no reading at all. Then
connect the motor wires at L3 and L4.

Assuming you already have L1 and L2 stored:

2ND L1 ^ 2 STO> 2ND L3 ENTER
2ND L2 ^ 2 STO> 2ND L4 ENTER

Go into the STAT:EDIT function and Highlight L3. Push 2nd DEL (INSERT), and Put L2 back in. If there was data in List 2, it should reappear.