## Friday, April 15, 2011

### Data Handling (Mean from Frequency Table)

How to calculate Mean from Frequency Table

A. The process
Refer to the following link for information on the process.

B. Notation

B. Question:

source: http://www.mathsisfun.com

1. No. of Parking Spaces = (15x1)+(27x2)+(8x3)+(5x4) =113
Sum of Frequency = 15+27+8+5=55

Mean= 113/55≈2.05

2. One parking space has a frequency of 15 so 15x1=15
So 2x27=54, 3x8=24 4x5=20
Total Parking Spaces=113
Sum of all the frequency: 15+27+8+5=55
Mean=113/55=2.05

3. Number of parking spaces= 1x15+2x27+3x8+4x5=113
The frequency =15+27+8+5=55
mean=113/55=2.05

4. Mean=
Frequency/number of parking lots=
(1x15)+(2x27)+(3x8)+(4x5)/(15+27+8+5)

So the mean is--> 113/55=2.054 (dots above 5 and 4)

5. Number of parking spaces:
(1x15)+(2x27)+(3x8)+(4+5)
=113
The frequency of the number of parking spaces:
15+27+8+5
=55
The mean:
113/55
=2.05

So the mean is 2.05.

6. no of parking spaces(total):(1*15)+(27*2)+(3*8)+(4*5)÷total frequency(15+27+8+5)
=113÷55approximately 2.05

7. Parking spaces= 15(1)+27(2)+8(3)+5(4)=113
Frequency= 15+27+8+5=55
Parking spaces/ Frequency = 113/55= 2.05
Mean=2.05

8. (15x1)+(27x2)+(8x3)+(5x4) =113
Sum of Frequency = 15+27+8+5=55

Mean= 113/55≈2.05

9. 1x15+2x27+3x8+4x5=113
15+27+8+5=56
113÷56=2.05

10. Total- 15x1+27x2+8x3+5x4
=113
Frequency-15+27+8+5
=55
Mean-113/55
approximate=2.05

11. Number of parking spaces:
(1x15)+(2x27) +(3x8)+(4x5)=113

The mean:

113/(15+27+8+5)=2.05...

Ans:2.05

12. No.of parking space=1(15)+2(27)+3(8)+4(5)=15+54+24+20=98+15=113
113/15+27+8+5=113/55≈2

So the mean is 2

13. Total Number of parking spaces: 15(1) + 27(2) + 8(3) + 5(4) = 113
Frequency: 15+ 27 + 8 + 5 = 55
Mean: 113/55 = 2.05

14. No of parking spaces=(1x15)+(2x27)+(3x8)+(4x5)
=113
The frequency of the number of parking spaces:15+27+8+5=55
The mean:No of parking spaces/The frequency of the number of parking spaces=113/55=2.05.
2.05 average is 2

15. Number of parking spaces:
(1x15)+(2x27)+(3x8)+(4x5)
=113
The frequency of the total number of parking spaces
= 15+27+8+5
= 55

The mean:
113/55 =(estimated) 2.05

16. Number of parking spaces = 1(15)+2(27)+3(8)+4(5)
= 113
Frequency = 15 + 27 + 8 + 5 = 55
mean = 113 / 55
= 2.05

17. Number of parking Space:15(1)+27(2)+8(3)+5(4)=113
Number of frequency: 15+27+8+5=55
Mean:113/55=2.05