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From what it’s evident on the page 64, top diagram about the products that my respondents spend their airmiles on, there were 43% of the respondents, who said that they don’t use airmiles.
This could have been due to the fact, that they might not be flying enough in order to get the sufficient. However, I have worked out the mean frequency distribution for the length of flights and how often/frequently they fly, provided below. The data provided below suggests, that they have been travelling enough, in order to obtain airmiles, but the fact that they don’t use airmiles can due to several reasons:
Mean Frequency Distribution for the type/length of my respondents' flights  
№ of hours  Midpoint  Frequency  Frequency*midpoint  
a) Longhaul flights  8 to 24  
b) Mediumhaul flights  3 to 7  
c) Shorthaul flights  0 to 1  0.5  0.5  
Total:  21.5  164.5  
(frequency*midpoint)/frequency= 164.5/25= 6.58  
6.58 hours is an estimted length of the flight that most of my respondents use 
Mean Frequency Distribution for how often my respondents fly  
№ of times  Midpoint  Frequency  Frequency*midpoint  
a) 12 times a year  1 to 2  1.5  
b) 35 times a year  3 to 5  
c) Other  5 to 12  8.5  93.5  
Total:  129.5  
(frequency*midpoint)/frequency= 129.5/25= 5.18  
approx.= 5 times a year is an estimated number of times when my respondents fly per year 
Mean Frequency Distribution for the 'other' types of flights that my respondents choose  
out of 44% of those who chose 'other'  
№ of times  Midpoint  Frequency  Frequency*midpoint  
a) 68 times  6 to 8  
c) 1012 times  10 to 12  
f) 16 20 times  16 to 20  
Total:  
(frequency*midpoint)/frequency= 97/10= 9.7  
approx.= 9.7 times a year is an estimated number of times when the respondents who  
chose 'other' flyper year 
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