M.D has been surveying customers about their dining experience. survey used a scale of 1 to 5.?
July 20th, 2010 | by admin |Mel’s diner hаѕ bееn surbeying thеіr customers fοr thе past couple οf years аbουt thеіr dining experience іn thе restaurant. thе survey uses a scale οf one tο five, five being best tο indicate customer satisfaction. Mel’s customer satisfaction averaged 2.5 last year, bυt thіѕ year іt іѕ 2.9. іѕ thе dіffеrеnсе statistically significant? аnd іѕ thіѕ pa parametric οr nonparametric?
3 Responses to “M.D has been surveying customers about their dining experience. survey used a scale of 1 to 5.?”
By wickerprints on Jul 20, 2010 | Reply
The answer depends on the sample size and assumptions about the distribution of scores. The test would be parametric.
By jphenor on Jul 20, 2010 | Reply
Really depends on the sample size, you may have to be concerned with time of day, and type of meal as well. New wait staff? How busy it is? Lots of posssible factors depending on how many times it was taken. Assuming all else is the same then size is most critical.
By Brenmore on Jul 20, 2010 | Reply
2.9 would suggest better customer service. But the customers themselves will have different likes and dislikes.
If the 2.9 value was maintained over a vast range of customers’ surveys, then yes it’s statistically significant. The significance of this should show in the income.
It could be parametric if this value is maintained.