Guest guest Posted February 22, 2012 Report Share Posted February 22, 2012 Asa! Well a T test is usually conducted to see if a difference in between two samples is statistically significant when tested for one variable...my understanding is that if we take 2 samples for example males and females and see a variable like for example caries(variable can be anything)...and we want to see if there is any statistically significant difference in between the two...then we will do a T test.For this we make a hypothesis(supposition).It may be like yes males and females have same caries incidence no(null) males and females do not have same caries incidence. Percentile is less confusing:) When we say we got 80% marks or 80% of children have caries then that means 80 out of 100. But when we say 80 Percentile it means that our marks are 79 or 80 percent more than the people who sat the exam...or in other words 80% people had less marks than us.Now the total number of candidates can be anything. I hope these makes sense.Feel free to correct me if I am wrong since I am no expert on stats:D > > > HI ALL > > I have been through statstics but can`t properly understand either the: > > 1. student T test or the 2. Percentile > I would be very grateful if anyone can give me a simpler explanation. > > best regards > ebtisam > Quote Link to comment Share on other sites More sharing options...
Guest guest Posted February 29, 2012 Report Share Posted February 29, 2012 hi everyone, want to know where should we read the statistics from, try to do the feedbacks but I don't have a proper source of information. thanks for your answers. regards. imene. Quote Link to comment Share on other sites More sharing options...
Guest guest Posted February 29, 2012 Report Share Posted February 29, 2012 thank you very much ebtissam. imene. > > > > HI NEDIA > Â 1. check the adult dental health survey for 2009 > 2, I will send u the stat ppt. > > > bets regards > ebtisam > > > > ________________________________ > From: Nebia Leila imene <imene.nebia@...> > > Sent: Wednesday, 29 February 2012, 13:35 > Subject: statistics > > > Â > hi everyone, > want to know where should we read the statistics from, try to do the feedbacks but I don't have a proper source of information. > thanks for your answers. > regards. > imene. > Quote Link to comment Share on other sites More sharing options...
Guest guest Posted April 4, 2012 Report Share Posted April 4, 2012 well done my dear .if you allow me to add that the percentage of hyper type l is 15% .reference Scully page 414 chap 17.keep going ebtessam well done and thanks From: ebtessam elhamalawy <ebtessamhamalawy@...> " " < > Sent: Wednesday, 4 April 2012, 21:09 Subject: Re: Statistics HI BALSAM\THIS IS A SUMMARY OF BOTH PINK AND LASTEST ADULT AND CHILDREN STATISTICSCanals :- Mand Incisors - >40% 2 canals but separate foramina in only 1% Maxillary 4 – 74% >1 canal >1 foramina Maxillary 5- 75% 1 canal and 1 foramina 94 % OF COMBINED POPULATION OF ENGLAND, WALES AND NORTHERN IRELAND WERE DENTATE EDENTATE IS 6% England 12% Scotland 17 % HAS HEALTHY PERIODONTAL GUMS. 10% HAS EXCELLENT ORAL HEALTH 31%HAS TOOTH DECAY. 45% OF ADULTS HAS PERIODONTAL POCKETING EXCEEDING 4MM. 84%OF DENTATE ADULTS HAS ATLEAST ONE FILLED TOOTH. ADULTS AGED UNDER 45 WERE LESS LIKELY TO HAVE ANY FILLINGS. 37% OF DENTATE ADULTS HAD ARTIFICIAL CROWNS. 66%OF DENTATE ADULTS HAD VISIBLE PLAQUE. CANCER survival in 65 year old: Stage 1->85% Stage 4-> 10% stage1 males: 90% survival 1st year stage 4 : 45% `65% survival 5 year 16% <55% survival 10 years 12% Submucosal fibrosis (due to betel quid chewing) 10% chances of malignancy in 10 – 15 years Tooth Wear (Attrition) 16-24yr old – 36% 65 yr and over – 89% Percentage of population having type 1 hypersensitivity – 20 – 30% Oral Cancer in UK – 2% Squamous Cell Carcinoma – 90% of total oral cancers 0.2 – 8% in Europe and USA Men- 58% CHILDREN DENTAL HEALTH SURVEY Caries FREE 5 YEAR OLD IN ENGLAND AND WALES IS 55% 33% active caries – 2006/2007 38% OF 12 YEAR OLD IN UK AND WALES HAD CARIES EXPERIENCE IN PERMANENT DENTISTION. 54%OF 9 YEAR OLD NEED ORTHODONTIC EXPERIENCE. 33% boys and and 19% girls have experienced trauma at 12 years age 5 year old trauma 30-40% at toddler stage More than 50% <4years trauma to primary tooth affects underlying developing successor Tooth erosion: 6 year old 52% 15 year old 27% Oral Cancers in uk: 2% which are 2000. Half die i.e. 1000 Percentage of fluoridated water in uk: 10% Percentage of people with allergy in uk 10% % of bacterial load decrease by cleaning – upto 80% Gingivitis : 17-24yr olds - 77% 25+ - 87% Periodontitis: 17-24 yr olds – 3% 25+ - 64% Percentage of plaque – 72% Percentage of calculus – 73% %age of fissure sealants that fail and get carious >85% - after one year >50% - after 5 yearsBEST OF LUCKEBTISAM From: Balsam_Majid <balsam_majid@...> To: " " < > Sent: Wednesday, 4 April 2012, 19:15 Subject: Statistics Would you plz attach the recent dental health survey to follow for statistics For adults and children Many thanks Balsam Sent from my iPad Sent from my iPad Quote Link to comment Share on other sites More sharing options...
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