Question
Find arithmetic mean from the following data using step-deviation method:
|
Temperature (°C)
|
-40 to -30
|
-30 to -20
|
-20 to -10
|
-10 to 0
|
0 to 10
|
10 to 20
|
20 to 30
|
|
No. of Days
|
10
|
28
|
30
|
42
|
65
|
180
|
10
|