Question

1
In continuous type of series, for finding mean, which amongst the following is considered as X variable value?
Select one:
ut of
O a. upper limit of the interval
O b. lower limit of the interval
c. none of these
O d. mid point of the interval​

Answer 1

Answer:

mid point of the intervals

Explanation:

Answer 2

A correct answer is option (d). "Mid-point of the interval".

There are three types of series:

1) Individual series: In these series, the frequency is not given. Only "X" is given. For example,

X

1

2

3

4

5

2) Discrete series: In these series frequencies are given. Both "x" and "f" is given. For example,

X       F

10      2

20     9

30      8

40      7

50      5

3)Continuous series: Its series to series in which the data is present in continuous form and each value of "x" have an interval, each value of "x" is called a "class- interval". Frequency is also mentioned in the data.

• Mid value = (upper limit + lower limit) ÷ 2

For example,

Class interval       Mid value(X)       frequency

0 - 10                         5                            5

10 - 20                      15                            6

20 - 30                     25                           2

30 - 40                      35                           8

40 - 50                      45                           9

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