Published: Oct 22nd, 2013
The purpose of this activity is to give you guided practice exploring the effect of sample size on the significance of sample results, and help you get a better sense […]
Published: Oct 22nd, 2013
Suppose that only 40% of the U.S. public supported the general direction of the previous U.S. administration’s policies. To gauge whether the nationwide proportion, p, of support for the current administration is […]
Published: Oct 22nd, 2013
The objective of this activity is to give you guided practice in carrying out the z-test for the population proportion (p). Background: This activity is based on the results of a […]
Published: Oct 22nd, 2013
Two hypothesis tests were conducted. In test I, a significance level of .05 was used, and the p-value was calculated to be 0.025. In test II, a significance level of […]
Published: Oct 22nd, 2013
The purpose of this activity is to give you a better sense of the p-value, and in particular, help strengthen your intuition about how it measures the evidence against the […]
Published: Oct 22nd, 2013
In each of the following scenarios, you need to decide whether it is appropriate to use the z-test for the population proportion p, and if not, which condition is violated. […]
Published: Oct 22nd, 2013
We are conducting a survey to determine if an upcoming bond measure will receive a majority vote in the county. The null hypothesis claims that p = 0.50, where p […]
Published: Oct 22nd, 2013
Consider the population of part-time college students. Suppose that 60% of this population is female. Here is the sampling distribution for the proportion of females in random samples of n […]
Published: Mar 18th, 2013
The purpose of this activity is to give you hands-on practice in following up a test for the population proportion p in which Ho has been rejected with a confidence interval, and […]
Published: Mar 18th, 2013
1. The Effect of Sample Size on Hypothesis Testing 2. Statistical significance vs. practical importance. 3. Hypothesis Testing and Confidence Intervals Let’s summarize CO-1: Describe the roles biostatistics serves in the […]