advertisement

Test of Proportions Z

50 %
50 %
advertisement
Information about Test of Proportions Z
Education

Published on December 2, 2008

Author: headlessprofessor

Source: authorstream.com

advertisement

Test of Proportions : Test of Proportions headlessprofessor When to use : When to use Inferential statistic: tests a null hypothesis When to use : When to use Inferential statistic Sample vs. norms design When to use : When to use Inferential statistic Sample vs. norms Binary nominal scale What you need : What you need Sample size Population proportion Sample proportion Proportion : Proportion Part / Whole Proportion : Proportion Part / Whole Percent / 100 Example : Example A sample of 64 Hancock’s customers Example : Example A sample of 64 Hancock’s customers Found 57 women and only 7 men. Example : Example N = 64 57 women & 7 men. For a proportion of 57 / 64 = .89 Example : Example N = 64 57 women & 7 men. Sample proportion = .89 Population = .50 How to Calculate : How to Calculate Ps – Pp --------------------- ((1-Pp) X (Pp / N)) ^.5 How to Calculate : How to Calculate Get denominator first and store it in the calculator memory How to Calculate : How to Calculate 1 – population proportion .5 = .5 How to Calculate : How to Calculate 1 – population proportion .5 = .5 Times population proportion .50 How to Calculate : How to Calculate 1 – population proportion .5 = .5 Times population proportion .50 .5 X .5 How to Calculate : How to Calculate Times population proportion .5 .5 X .5 = .25 How to Calculate : How to Calculate .5 X .5 = .25 Divide by 64 How to Calculate : How to Calculate = .25 Divide by 64 Equals = .0039 How to Calculate : How to Calculate = .25 Divide by 64 Equals = .0039 Square root =.0625 How to Calculate : How to Calculate equals .0625 That is the denominator How to Calculate : How to Calculate equals .0625 That is the denominator Save it in your memory (don’t round) How to Calculate : How to Calculate Get the numerator How to Calculate : How to Calculate Get the numerator Sample proportion minus population proportion How to Calculate : How to Calculate Get the numerator Sample proportion minus population proportion .89 - .50 = .39 How to Calculate : How to Calculate = .39 That is your numerator How to Calculate : How to Calculate = .39 That is your numerator Divide by / Memory recall Equal How to Calculate : How to Calculate = .39 That is your numerator Divide by / Memory recall Equal = 6.24 How to Calculate : How to Calculate Equal = 6.24 That is your Z score How to Calculate : How to Calculate Go to your T table Look at last row (infinity) How significant is this? : How significant is this? How significant is this? : How significant is this? What this means? : What this means? There is less than one chance in a thousand that such a sample of 89% female would be drawn randomly from a population of 50% female. What this means? : What this means? Therefore, we should Reject the null hypothesis Alternative tests : Alternative tests Chi Square: Observed = sample Expected = from population Alternative tests : Alternative tests Chi Square Kolomogorov-Smirnov Alternative tests : Alternative tests Chi Square Kolomogorov-Smirnov Binomial Distribution Test of Proportions : Test of Proportions headlessprofessor

Add a comment

Related presentations

Related pages

Hypothesis Test: Difference in Proportions

How to conduct a hypothesis test to determine whether the difference between two proportions is significant. Includes examples for one- and two-tailed tests.
Read more

Z Test Calculator for 2 Population Proportions

Z Test Calculator for 2 Population Proportions. This test is used when you want to know whether two populations or groups (e.g., males and females ...
Read more

Z Test Calculator for 2 Poulation Proportions

A Z-test calculator that measures whether two populations differ significantly on some single, categorical characteristic.
Read more

z-Test for Proportions, Two Samples - StatisticsLectures.com

Steps for z-Test for Proportions, Two Samples; 1. Define Null and Alternative Hypotheses. 2. State Alpha. 3. State Decision Rule. 4. Calculate Test Statistic
Read more

One-sample test of proportions - Harvard University

One-sample test of proportions Test Statistic: If H ... Null and alternative hypotheses same as for two-sample z-test Test statistic is now If H
Read more

Hypothesis Test for a Proportion - Statistics and Probability

How to conduct a hypothesis test of a proportion. Covers one-tailed tests and two-tailed tests. Includes two hypothesis testing examples with solutions.
Read more

One Sample z-Test for Proportions - Statistics Lectures ...

Steps for One-Sample z-Test for Proportions; 1. Define Null and Alternative Hypotheses. 2. State Alpha. 3. State Decision Rule. 4. Calculate Test Statistic
Read more

Making Sense of the Two-Proportions Test - iSixSigma: Six ...

Use a two-proportions hypothesis test to determine whether a Six Sigma project actually improved the process. The test compares the percentages of two groups
Read more

z-test for independent proportions: Use & misuse ...

z-test for independent proportions: Use & misuse - independent proportions, risk difference, confidence interval of difference, critical ratio test, chi ...
Read more

Comparing Two Proportions | STAT 414 / 415

Comparing Two Proportions. Printer-friendly version. ... And, hence, our test statistic becomes: [Z=dfrac{(hat{p}_1-hat{p}_2)-0}{sqrt{hat{p} ...
Read more