May
22
Results on tips; your thoughts?
After a month of gathering data (yay data!) on the tips that were left for myself, here are the initial results. If anyone really wants to see the Excel sheets, I can show you, and apologies for the statistical speak (it gets me excited).
(n= is the quantity of data in particular set; “outlier” is more than twice the standard deviation of the average)
Based on age & race (with outliers/ without outliers):
White people:
Black people:
- Young (n=29) - 20.1/19.5%
- Middle (n=42) - 20.1/19.5%
- Older (n=14) - 18.3/17.7%
- Young (n=7) - 17.9/17.9%
- Middle (n=6) - 15.8/15.8%
- Older (n=3) - 16.5/16.5%
Other Ethnicity:
- Young (n=8) - 18.6/18.6%
- Middle (n=4) - 17.4/17.4%
- Older (n=0) - N/A
Based on sex:
- Women (n=47) - 19.6/19.1%
- Man (n=55) - 18.5/18.5%
Based on Type of card* used:
- Amex (n=7) - 19.5/19.5%
- Discover (n=0) - N/A
- MasterCard (n=14) - 18.1/18.8%
- Visa (n=48) - 19.5/19.3%
Overall average tip:
19%
Observations:
- Both black people and Other need more data collected to start drawing conclusions; their standard deviations were huge, and confidence was low.
- The * indicates this realization: I wanted the “Type of Card” data to be on credit cards, but I forgot most Visas are also debit cards. Should I try to keep it limited to just credit cards, or all card types?
- MasterCard users tip lowest, While Amex users consistently tip highest.
- Lowest tip: 5.3% (Middle Black Male); Highest tip: 42.9% (Young White Male)
Further research:
- Someone suggested I separate data further, into Day of the Week. Yes?
- Is there anything you guys want to see?
- I will continue to collect data over the next months. This is becoming really interesting.
Your thoughts/concerns/questions?
