Find the Weighted Mean

 Northwestern distribution company surveyed 53 of its midlevel managers. The survey obtained the ages of these managers, which later were organized into the frequency distribution .

Class Interval Frequency
20 - 24    8
25 - 29    6
30 - 34    5
35 - 39   12
40 - 44   15
45 - 49    7

Find the weighted mean of the following:

1. I consistently retain the final decision making authority and the
staff/followers must simply follow my directives or instructions.

4 3 2 1

2. I guide my staff/followers by providing them with sense of
meaning to work enthusiastically and optimistically to foster the
spirit of teamwork and commitment to ensure that everyone has a
contribution to make.

4 3 2 1

3. I want everything to remain strictly as they are (the normal flow of
operations), and do not believe in improving working conditions to make
things better.

4 3 2 1

4. I adopt the philosophy of moving towards change the way the task is
perform and anticipates challenges and developments effectively rather
than avoiding or resisting it in the workplace.

4 3 2 1

5. I do not encourage my staff/followers to act creatively or think for
themselves.

4 3 2 1