This test is used to test a claim about the proportion (or percentage) of a single population, such as this claim: "The percentage of statistics students who pass is equal to 93%."
First select the format of the original claim that is to be tested. Note that there are 6 different choices, which can be viewed by clicking on the small box to the right of the default claim ("Pop. Proportion = Claimed Proportion"). Use the up/down arrow keys to highlight the desired choice, then click on that desired choice. STATDISK will determine the appropriate null hypothesis from the claim selected.
Significance (level): Enter a positive value in decimal form, such as 0.05.
Claimed Proportion: Enter the value of the proportion used in the original claim.
Sample Size, n: Enter the sample size as a positive whole number.
Num Successes, x: Enter the number of successes as a positive whole number.
For example, if testing the claim that "the percentage of statistics students who pass is equal to 93%," and sample data consist of 200 students with 188 of them passing, then enter 0.93 for the value of the claimed proportion, enter 200 for n, and enter 188 for x.
Click on the Evaluate button to obtain the results.
Click on the Print button to print the results.
Click on the Plot button to display a graph showing the distribution with the test statistic and critical value(s).
To close the window, click on the X at the top of the module window.