Createachartbasedonthe casebelow,anddraw aninference fromthedata.

Background

AppleTreeFitnessisanindependentfitnessclubinTokyolocatednearaprivaterailwayline.The club mainlytargetswomen, butrecentlythe numberof male members has increased.Businessresultshavebeen improvingeveryyear,althoughslowly.

Asthe owner,youare concernedthatthe customers' age maybe shifting upwards, basedonyourobservationduringasitevisit.Sofar,theredoesnotseemtobemuchimpactontheprofitratio,etc.,butif customersareaging, itcouldimpactthebusiness inthelongrun.

Apple Tree Fitness normally askscustomers toprovidetheiraddressandcontactdetailswhenthey became members, but has a policy of not asking for informationon their age or maritalstatus.Therefore,tofindouttheirage,thecompanysentaquestionnaire tocustomers whovolunteered,andofferedthemasmallreward forparticipating.

Thefollowingaretheresultsofthesurveysdoneboththreeyearsago andthisyear.

Agesofcustomers:Threeyearsago

18	19	21	21	22	23	23	24	26	26	26	26	27	27	27	28	28	29
30	30	30	31	31	32	32	33	34	35	35	36	38	38	39	40	41	42
42	42	43	43	44	44	44	45	46	48	48	48	48	52

Agesofcustomers:Thisyear

21	22	23	24	25	26	26	27	27	27	27	28	28	28	29	30	31	31
31	32	32	33	34	35	36	36	37	39	39	40	40	40	41	43	43	43
44	44	45	45	45	45	46	46	47	48	48	49	51	55