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How to Compare Two Population Proportions  dummies
If you’re running an F Test using technology (for example, an ), the only steps you really need to do are Step 1 and 4 (dealing with the null hypothesis). Technology will calculate Steps 2 and 3 for you.
If the test statistics for z falls outside this interval we decidethat the means differs, we chose the alternate hypothesis, H_{a}Otherwise we have no reason to think that they differ, H_{0}By Examples:Problem 1.
about the populations they came from
Question 3: Some students who belong to Greek organizations (e.g. fraternities and sororities) believe that they do not drink anymore or less than nonGreekorganization students. However, the university administration does not agree, and wants to show that on average, the population of Greek students drink more more frequently during any given month than their nongreek counterparts. What would be the correct hypothesis to determine if the administration is correct? Assume that nongreeks are population and greeks are .
NOTE: This was a twosided test since we used "not equal" in the alternative hypothesis (also see that says "not = 0"). If the research interest was to show that on average righthand spans were longer than lefthand spans then our new Ha would use > and we need to divide this pvalue by 2. In then next example we show how to use minitab to conduct such onesided hypothesis tests.
Hypothesis Testing of the Difference Between Two ..
Hypotheses Statements: What would be the correct hypothesis to determine if mean right hand spans differ than mean left hand spans among PSUUP undergraduate students?
Hypotheses Statements: What would be the correct hypothesis to determine if there is a difference in gender between the true percentages that would date someone with a great personality even if they did not find them attractive among PSUUP undergraduate students?
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Hypothesis testing of the difference between two population means ..
The following summarizes population and sample notation for comparisons, and gives the null hypothesis for each situation (proportions and means).
Two Sample Hypothesis Testing to Compare Variances  …
NOTE: The use of "0" for the difference is common practice. Technically however this difference could be any value. For example, we could say that the difference between the percentage of males that smoke to the percentage of females that smoke is equal to 4%. Now the null hypothesis would read: H0: p_{1} – p_{2} = 0.04. For our class we will restrict ourselves to using a difference of 0.
Comparing Two Populations  Project GROWS
If the test statistics for z falls outside this interval we decidethat the means differs, we chose the alternate hypothesis, H_{a}Otherwise we have no reason to think that they differ, H_{0}By Examples:Problem 2.
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If the test statistics for z falls outside this interval we decidethat the means differs, we chose the alternate hypothesis, H_{a}Otherwise we have no reason to think that they differ, H_{0}By Examples:Problem 3.
An electronics company wants to compare the quality of their ..
If the test statistics for z falls outside this interval we decidethat the means differs, we chose the alternate hypothesis, H_{a}Otherwise we have no reason to think that they differ, H_{0}By Examples: Problem 4.
The populations have the same ..
In order to make this comparison, two independent (separate) random samples need to be selected, one from each population. The null hypothesis H_{0} is that the two population proportions are the same; in other words, that their difference is equal to 0. The notation for the null hypothesis is H_{0}: _{1} = _{2}, where _{1} is the proportion from the first population, and _{2} is the proportion from the second population.
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