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Class limits
These are numerical values, which limits uq extended of a given class that is all the observations in a provided class are expected to fall in the interval which is bounded by the class limits for illustration 15 & 19 are class limits as in the table of the illustration above.
Class boundaries
These are statistical boundaries, which separate one class from the other. They are normally determined by adding the lower class limit to the next upper class limit and dividing by 2 for illustration in the above table the class boundary among 19 and 20 is 19.5 that is = (19 + 20)/2
Age (yrs)
No. of Students (f)
mid points (x)
x-a = d
D/c = u
fu
15 - 19
21
17
-15
-3
-63
20 - 24
35
22
-10
-2
-70
25 - 29
38
27
-5
-1
-38
30 - 34
49
32(A)
0
35 - 39
31
37
+5
+
40 - 44
19
42
+10
+2
193
-102
A man arranges to pay a debt of Rs.3600 in 40 monthly instalments which are in a AP. When 30 instalments are paid he dies leaving one third of the debt unpaid. Find the value of th
triangular with base AB = 48cm and height CH=16cm is inscribed a rectangle MNPQ in which MN: MQ = 9:5 Find MN and MQ
11/20=
10000+9854
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