Presentation Summary : A Z-Test uses the normal distribution to obtain a test statistic based on some data that can be compared with a sampling distribution of chance, ...
Source : http://utminers.utep.edu/crboehmer/T-Tests%20&%20Chi2.ppt
Presentation Summary : 8.4 Testing the Difference Between Proportions Statistics Mrs. Spitz Spring 2009 Objectives/Assignment How to perform a z-test for the difference between two ...
Source : http://www.dgelman.com/powerpoints/statistics/spitz/8.4%20Testing%20theDifference%20Between%20Proportions.ppt
Presentation Summary : 7.4 Hypothesis Testing for Proportions Statistics Mrs. Spitz Spring 2009 Objectives/Assignment How to use a z-test to test a population proportion, p.
Source : http://www.dgelman.com/powerpoints/statistics/spitz/7.4%20Hypothesis%20Testing%20for%20Proportions.ppt
Presentation Summary : Comparing Two Proportions (p1 vs. p2) Inferential Methods Large independent samples 1. z-test for comparing p1 vs. p2 2. CI for (p1 – p2) 3.
Source : http://elearning.winona.edu/projects/N701/Powerpoints/ComparingTwoProportions.ppt
Presentation Summary : The z Test: An Example. ... so our hypothesis test is . two-tailed. THIS z Table lists the percentage under the normal curve, between the mean (center of distribution
Source : http://www-personal.umd.umich.edu/~acfoos/Courses/381/Hypothesis%20Testing%20with%20z%20Tests.pptx
Presentation Summary : Comparing Population Parameters (Z-test, t-tests and Chi-Square test) Dr. M. H. Rahbar Professor of Biostatistics Department of Epidemiology Director, Data ...
Source : http://www.pitt.edu/~super7/19011-20001/19031.ppt
Presentation Summary : Assumptions and Conditions for a 1-proportion z-test. The data are an SRS. This takes care of randomization. The population is at least 10 times the sample size
Source : http://schools.nashua.edu/myclass/kimballm/apstats/Chapters%2011%20%2012%20Documents/Proportions%20and%20Inference%20-%201%20and%202%20prop%20z-tests.pptx
Presentation Summary : The t-test Inferences about Population Means Questions What is the main use of the t-test? How is the distribution of t related to the unit normal?
Source : http://faculty.cas.usf.edu/mbrannick/regression/8%20The%20t-test.ppt
Presentation Summary : T-tests Computing a t-test the t statistic the t distribution Measures of Effect Size Confidence Intervals Cohen’s d Z as test statistic t as a test statistic t as ...
Source : http://www.columbia.edu/cu/psychology/courses/S1610q/lectures/07Ttests.ppt
Presentation Summary : One Sample and Two Sample T-tests Introduce t test Hypothesis testing using a t test Paired t test Independent samples t test Recap Single score compared to a known ...
Source : http://www.unt.edu/rss/class/mike/3610/psyc_3610_t-test.ppt
Presentation Summary : Two Proportion z-Interval and z-Tests Small differences. Recall from Random Variables If X and Y are two independent Random Variables from Normal distributions, we ...
Source : http://wheelesclassroom.wikispaces.com/file/view/Two+Proportion+z-Tests.ppt
Presentation Summary : test is a statistical test for the mean of a population. It can be used when
Source : http://navimath.files.wordpress.com/2014/01/sec-8-2-z-test-for-a-mean.pptx
Presentation Summary : Hypothesis Testing Goal: Make statement(s) regarding unknown population parameter values based on sample data Elements of a hypothesis test: Null hypothesis ...
Source : http://www.stat.ufl.edu/%7Ewinner/sta6934/hyptest.ppt
Presentation Summary : Hypothesis Testing – Two Samples Chapters 12 & 13 Chapter Topics Comparing Two Independent Samples Independent samples Z test for the difference in two means Pooled ...
Source : http://www.bjgumm.com/psy2402/1213.ppt
Presentation Summary : Hypothesis Testing Methodology Z Test for the Mean (s Known) p-Value Approach to Hypothesis Testing Connection to Confidence Interval Estimation
Source : http://www.albany.edu/faculty/shobha/bmsi322/8.ppt
Presentation Summary : Z-test for means and proportions * Tests of significance How do we determine how good our estimate of s ... We need to test the hypothesis: Null hypothesis ...
Source : http://faculty.ccc.edu/colleges/hwashington/math/Ougouag/Math125-Chap10.ppt
Presentation Summary : Advanced Data Analysis – Hypothesis Testing Hypothesis Tests z-test Used to test hypotheses that a mean is greater (less) than or equal to some value
Source : http://www.bus.iastate.edu/laczniak/MKT%20444%20--%20Web%20Files/Advanced%20Data%20Analysis%20z-test%20hypothesis%20testing%2007.ppt
Presentation Summary : Aim: How and when do we perform a z test? HW#8: complete last 2 slides T test vs. Z test Z test is used for the mean of a large sample T test is used for the mean of ...
Source : http://bxscience.enschool.org/ourpages/auto/2010/2/3/49290090/lesson24-z%20test%20for%20means.ppt
Presentation Summary : ... Means * Two-Sample Z test We want to test the null hypothesis that the two populations have different means H0: 1 = 2 or equivalently, 1 ...
Source : http://alexbraunstein.com/lecture14.ppt
Presentation Summary : Normal curve and z-scores We can use the information from the normal curve to estimate percentages from z-scores. Test your mastery of z If a raw score is 8, the ...
Source : http://faculty.cas.usf.edu/mbrannick/stats/5_Z&Normal.ppt