Statistical Applets P-Value For A Test Of One Proportion

This applet illustrates the P-value for a significance test involving one population proportion, p. These concepts easily apply to any other significance test for the center of a distribution. The Normal curve shows the sampling distribution of the sample proportion p̂ when the null hypothesis is true. The blue arrow shows in which direction the "extreme" values of p̂ will be evidence against the null hypothesis, H₀ in favor of H_a If you change the alternate for any situation, you can see the impact on the P-value (the probability of a sample result at least as far away from the null value as that seen in the data, assuming the null hypothesis is true).	To set up the test, fill in the boxes: What null hypothesis H₀ about the population proportion p do you want to test? Which alternative (this represents the question) is of interest? How many observations (n) do you have (30,000 or fewer)? If you already have a sample, enter the number of "successes" to display the sample proportion on the graph and calculate the P-value. Or you can specify the true population proportion and use the NEW SAMPLE button to create a random sample from the population, display the sample count and proportion, and calculate the P-value.

Statistical Applets

P-Value For A Test Of One Proportion

This applet illustrates the P-value for a significance test involving one population proportion, p. These concepts easily apply to any other significance test for the center of a distribution.

The Normal curve shows the sampling distribution of the sample proportion p̂ when the null hypothesis is true. The blue arrow shows in which direction the "extreme" values of p̂ will be evidence against the null hypothesis, H₀ in favor of H_a

If you change the alternate for any situation, you can see the impact on the P-value (the probability of a sample result at least as far away from the null value as that seen in the data, assuming the null hypothesis is true).

To set up the test, fill in the boxes: What null hypothesis H₀ about the population proportion p do you want to test? Which alternative (this represents the question) is of interest? How many observations (n) do you have (30,000 or fewer)?

If you already have a sample, enter the number of "successes" to display the sample proportion on the graph and calculate the P-value. Or you can specify the true population proportion and use the NEW SAMPLE button to create a random sample from the population, display the sample count and proportion, and calculate the P-value.