A junior accountant of a particular supermarket was asked to give a summary of daily profits realized for a period of time. He represented his data as follows:
|
Profit (ksh '0000)
|
0-3
|
4-7
|
8-11
|
12-15
|
16-19
|
20-23
|
24-27
|
|
No. of days
|
10
|
20
|
8
|
30
|
7
|
13
|
12
|
I. Determine the mean profit
II. Further scrutiny of the raw data revealed that the frequency of the groups ‘8-11'and '16-19' were not as indicated. With the correct frequencies, the mode and the median were given as Ksh. 139000 and Ksh. 135000 respectively. Determine the correct frequencies.