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Topic: Pearson's chi-square test

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Com. 300, Chapters 10-12 If the value of the test statistic is such that it very likely was drawn from a population where the variables were not related, then the null hypothesis is accepted; otherwise the null hypothesis is rejected and the researcher concludes that the research hypothesis is supported. The key assumptions in hypothesis testing is that the data consistute a random sample of observations from a population of concern. Test for Indepence of Samples, which test to see if there is any relationship between two categorial varibles based on their marginal distributions. excellent.com.utk.edu /~mmmiller/c300c10f.html   (1231 words)

Statistics.html Testing for the significance of sample correlation coefficient in sampling from bivariate normal distribution and for the equality of means and equality of variances in sampling from bivariate normal distributions. Testing for the mean and variance of univariate normal distribution, testing of equality of two means and testing of equality of two variances of two univariate normal distributions. Large sample Tests : Use of central limit theorem for testing and interval estimation of a single means and a single proportion and difference of two means and two proportions, Fisher's Z transformation and its uses. www.uniraj.ernet.in /syllabi/B.Sc-II/Statistics.html   (638 words)

GLOSSARY A two-tailed test is a statistical test of significance in which the critical area (the area of rejection) is at both ends (tails) of the distribution. An upper-tailed test is one in which the rejection region (for rejecting the null hypothesis) is at the upper tail or right hand end of the distribution. A statistical test in which the total area to the left of some point in the probability distribution provides the relevant probability is called a lower-tailed test. homepages.wwc.edu /staff/sopewa/206new/glossary/glossary.htm   (5165 words)

437_Pearsons[1].Product.Moment.Correlation_final3.doc Pearson's method uses the actual, individual values of X and Y and can be used with samples or the population. Pearson's coefficient of correlation is only associated with linear correlation and continuous data. According to the table of critical values for Pearson's r, the minimum value of r is 0.7646, with a df of 8 (n (2 = 10 (2 = 8 pairs of data), at the 0.01 level. www.teleologic.net /db_content/document/15/Lesson437/1133/437_Pearsons[1].Product.Moment.Correlation_final3.doc   (2888 words)

Dana Point Rowing Club-Pacific West Rowing - Ergometer Table III presents each dependent variable determined to be statistically significant based on a Pearsons chi-square test for a single-subject design. Total testing time for the two tests were four minutes and four seconds for the pretest and thirteen minutes and thirty-nine seconds for the posttest. For muscle testing, the patient was assisted and placed in a seated position on the bench of the isokinetic device. pwrow.tripod.com /urow12.html   (11642 words)

25all.eng.txt Pearsons test of correlation between percentages of muscle fibre types and pH1 showed negative interdependence between the percentage of fast contracting glycolitic fibres and pH1 in both muscles. The serological tests in group 2 were diagnostic in 18 patients: six were infected with Mycoplasma pneumoniae, five with Chlamydia psittaci, two with Coxiella burnetii and Chlamydia pneumoniae and three with adenovirus. The head-upright tilt-table test was performed in 52 vertigo patients; the test was positive only in 11,5 % of patients- all test positive patients had a prior episode of syncope. www-ai.ijs.si /~spela/med/25all.eng.txt   (10851 words)

Student Reseach   2002 Descriptive statistics were used and the results calculated for non-parametric variable with Chi-square test. To explain the delays in those two tests it wold be necessary to explain the interaction between the body systems and the environment the children grow up in. Neurodynamic tests are widely used amongst physiotherapists who deal with patients that have neural symptoms in upper and lower limbs and it is important for them to have reference values to use when evaluating the outcomes of those tests. www.physio.hi.is /resstu03.htm   (4127 words)

August issue.indd Pearsons Chi-Square Test on the relevant contingency table was used to test whether the two attributes, N and location (M and AM) were independent variables and a p-value = 0.05 was considered significant. The Pearson Chi-Square test showed that the lymph node involvement and the location (M versus AM) were not statistically independent (p-value=0.014): M located tumours were associated with higher number (43/101 = 42.5%) of metastatic lymph nodes (N1 and N2), whereas AM tumours are associated with involved lymph nodes in only 5/37 (13.5%) tumours (Figure 4). Statistical analyses were performed using the test for proportions (with continuity correction), the Pearson Chi-square test and generalised linear models; p<0.05 were considered statistically significant. www.rcsed.ac.uk /journal/svol2_4/2040003.html   (3025 words)

sci.crypt: Re: FFT test with few kbits The proper test for F_0-N/2 is exactly the same as for the others. all of the positions have the same mean square (1/2 in your system). I think it is useful to test F_0 - N/2 with the proper test www.derkeiler.com /Newsgroups/sci.crypt/2004-02/1398.html   (674 words)

EPA - Comparisons (Primer) Parametric tests assume that the variables you are testing or comparing are distributed in a particular way, typically normally distributed. The primary advantage of parametric testing is that you get slightly more statistical power to detect differences, but not much. In many cases, parametric and nonparametric tests will give the same answer regarding statistical significance. www.epa.gov /bioindicators/primer/tablenp.html   (280 words)

Crisp Volume 3 No. 3 To test for ordering effects, half the respondents were told that the information was in the form of a radio commercial, while the other half heard it from a good friend (the information was stated exactly the same in both vignettes). To test for spurious relations of ordering and source effects, a multinomial logit analysis was constructed to test for any such effects in addition to the observed third person effect. Tests of mean differences between self and both categories of others were all significant at the.01 level. www.uiowa.edu /~grpproc/crisp/crisp.3.3.htm   (3637 words)

El Centro College: Communications Math Division Test hypotheses regarding the association between two nominal variables using the chi-square distribution. Test hypotheses concerning populations means and proportions using both the normal and T-Distributions. Measure the correlation between two variables by calculating and determining the significance of Pearsons’ product-moment of correlation or by linear regression. www.ecc.dcccd.edu /Programs/CommunicationsMath/math/math2342.htm   (744 words)

UMDNJ - School of Health Related Professions: Nutrition Separate chi-square and Fisher's exact tests were performed to determine if educational background, professional expertise, place of employment and patient population were related to practice level. Pearson product moment correlation coefficient was used to compare relationships among the variables; independent t-test was used to compare mean total knowledge scores among faculty of the clinical vs. academic settings; one-way ANOVA was used to compare mean scores among the various health professions. Chi square analysis (JMP-IN 3.2.6) and stepwise logistic regression (SAS 8.0) was used for analysis with p set at.05. shrp.umdnj.edu /nutr/mscn/mscn_alumni_thesis.htm   (13123 words)

courses.txt Chi-square test: test of independence; Test of goodness of fit, test of omogeneity; Multiple regression' analysis: estimation of a, b1.b2.bn parameters and the 'determination of R2 and their application to Economic analysis. www.mu.ac.ke /docs/data/data_txt/courses.txt   (275 words)

List of statistical topics: Encyclopedia topic Pearson's chi-square test (Pearson's chi-square test: more facts about this subject) (one of various chi-square tests, a list of which should eventually be put at chi-square test (chi-square test: a chi-square test is any statistical hypothesis test in which the test statistic has... Binomial test (Binomial test: in statistics, the binomial test is an exact test of the statistical significance... Mantel test (Mantel test: the mantel test is a statistical test of the correlation between two matrices.... www.absoluteastronomy.com /reference/list_of_statistical_topics   (5398 words)

Mathematics Catalog Listing Classical tests within the normal theory such as F-test, t-test, and chi-square test will also be considered. Methods of linear least squares are used for the study of analysis of variance and regression. Special topics in combinatorics including Latin squares, theory of partitions, Kirkman's triple system, permutations and derangements, binomial coefficients, and design theory. www.middlebury.edu /academics/ump/majors/math/courses/catalogs   (2708 words)

Indian Pediatrics - Editorial Mean, standard deviation and error, percentile, Pearson correlation matrix, linear regression, paired 't' tests, chi square test and analysis of variance were also calculated. The Pearson correlation matrix Was applied to study the impact of socio- demographic variables on weight and midarm circumference. The reliability of these equations was checked by using paired 't' test and it was found that the difference in the observed and calculated values was non-significant. www.indianpediatrics.net /oct1998/oct-975-983.htm   (1906 words)

sci.optics: Re: phase in quantum optics sum of the square of the orthogonal distance between the... important: square the sum, not sum the squares. and intensity I is to take the square of the amplitude: I = AA*. sci.tech-archive.net /Archive/sci.optics/2004-10/0140.html   (412 words)

Diabetes Care: Assessment of asymptomatic coronary artery dise... @ HighBeam Research The Pearson [chi square] test was used for comparison of frequency. Noninvasive tests currently used for screening diabetic patients for CAD are able to identify only subjects with myocardial ischemia due to significant coronary stenosis, but they cannot exclude nonocclusive CAD. Lp(a) levels are considerably easier to test on a large scale than apo(a) size and, particularly among Caucasians, small apo(a) size correlates well w ith high Lp(a) levels; therefore, Lp(a) levels should be measured in all patients with diabetes. www.highbeam.com /library/doc0.asp?DOCID=1G1:90511377&ctrlInfo=Round17:ProdCtrl:DocFree:Result&ao=   (4523 words)

Diagnostic Efficiency of the Blacklayer Stalk Nitrate and Grain Nitrogen Tests for Corn -- Brouder et al. 92 (6): 1236 -- Agronomy Journal and this tissue test (Bates, 1971; Cerrato and Blackmer, 1990; Hooker B.A., Morris T.F. End-of-season corn stalk test for excess nitrogen in silage corn. in either test indicates that the model fit may not be good. agron.scijournals.org /cgi/content/full/92/6/1236   (6441 words)

Introduction Descriptive statistics within categories of the control variable and one-way analysis statistics such as: total sum of squares, between means sum of squares, within groups sum of squares, eta and eta squared (unadjusted and adjusted) and the F-test value. The square matrix is used for symmetric arrays of bivariate statistics with a constant on the diagonal. Three sample of cases can be distinguished: basic sample on which the main discriminant analysis steps are performed, test sample on which the power of the discriminant function is checked and anonymous sample which is used only for classifying the cases. www.unesco.org /webworld/idams/Doc/ManualHtml/E1intro.htm   (3037 words)

Untitled Document Comparison of the nutritional status of the children in the two dose groups (200mg and 400mg) of oral iodized oil was done using Pearsons Chi square test while differences between hormonal concentrations of the two dose groups were compared using group t-test. The study included clinical examination of goitre, biochemical tests for thyroid function, and assessment of nutritional status of the children. Thyroid function tests (T3, T4, and TSH) of the two groups at base-line were also indicated in Table 1. www.cih.uib.no /journals/EJHD/ejhd-v14-n1/ejhd-14-1-49.htm   (2817 words)

Results from Form 1 of Page Documents/Forms/abstract_for_racgp_scientific_meeting.htm A Pearsons Chi-Square test was performed comparing percentage of patients in goal for risk factors. The model and terminology will be tested, on paper and electronically, by health care professionals in an Integrated Care Centre and GPs in the catchment. The education package is two sessions of three-hour duration small group discussion, case presentation and practical demonstration of inhalation modalities and lung function tests. www.aaagp.org /Conferences/RACGP/2001/fabstracts_results.htm   (3190 words)

Computing the Deviance and is on in CoCo), the likelihood ratio test statistic -2Log(Q), Pearsons chi-square When two ordinal factors are tested conditionally independent Goodman and Kruskal's Gamma   coefficient with p-value is also returned. will print the deviance for the test between the current and base model and the p-value for this statistic based on the unadjusted and the adjusted number of degrees of freedom. www.math.aau.dk /~jhb/Thesis/PartIII/node53.html   (315 words)

SPSSX-L archives -- November 1998 Sv: inconsistent Pearsons r-values in REGRESSION-output from SPSS 8.01 inconsistent Pearsons r-values in REGRESSION-output from SPSS 8.01 Post hoc tests for repeated measures (5 messages) www.listserv.uga.edu /cgi-bin/wa?A1=ind9811&L=spssx-l   (1172 words)

Is a biologically oriented approach to the palliation of HIV-related Kaposi's sarcoma feasible? A statistical analysis was performed (chi square test with Yates's correction, Spearman's ranks and Pearsons's correlation tests). www.esmo.org /reference/abstracts/psc/717.htm   (276 words)

Diary for salmoni Anyway, I have the Friedman chi square working (needs testing), but the Kruskal Wallish needs work still (p = 0.000 with similar data). Once I have done the within subjects anova, the next thing (after testing it!) is to work on getting the existing tests working, but I shall also need to work on this "modular" architecture - enabling people to write their own tests and include them as a kind of plugin. Present are: Wizard ("what test should I use"), Topics (normal help), Licence (the GPL in full), and About (list of all the people involved). www.advogato.org /person/salmoni/diary.html?start=30   (2074 words)

Cocaine use among a sample of police detainees [T&I no. 276] Consistent with these sources, data from DUMA also showed an increase in cocaine use during 2001 and into 2002, with the number of police detainees testing positive to cocaine rising, however by the end of 2002 the proportion testing positive had dropped off (Makkai and McGregor 2003). Positive tests for cannabis (51 per cent) and benzodiazepines (42 per cent) were also high. Given the short half-life of most illegal drugs, it is possible that a substantial proportion of those who tested positive to cocaine used other drugs concurrently. www.aic.gov.au /publications/tandi2/tandi276t.html   (4007 words)

EEFinRep.txt Seventy five percent (N=220) of teachers said they use an integrated curriculum, with EE teachers significantly more likely to use an integrated curriculum than Non-EE teachers (Pearsons Chi-Square = 14.29; N = 267; df = 1; p <.001). All tests were done with SPSS using a significance level of.05. Comparisons between the two groups were made using standard statistical tests, including the independent-samples t-test and 2-way contingency table analysis. www.evergreen.edu /ecei/reports/EEFinRep.txt   (11267 words)

Web Sites We've Found This web site will perform the chi square test if you enter the numbers. This will find Pearsons r for you if you have the correaltion coefficient and smaple size. It describes nonparmetric tests, specifically Mann-Whitney U test. facstaff.uww.edu /eamond/Courses/215/Student_215_websites_S00.htm   (774 words)

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