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Hypothesis Testing with Statdisk
0800-HTStatdisk.doc
Hypothesis Testing with Statdisk
This test is used to test a claim about the mean of a single
population, such as this claim: "The mean IQ of statistics
students is greater than 100."
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. Mean = Claimed Mean"). 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 Mean: Enter the value of the mean used in the
original claim.
Population StDev: Enter a value for the population
standard deviation only if it is known (otherwise, leave this
box blank). In reality, this value is usually not known, so
this box is usually left blank. DO NOT ENTER THE VALUE
OF THE SAMPLE STANDARD DEVIATION HERE.
Enter the sample size as a positive whole number.
Enter the value of the sample mean.
Enter the value of the SAMPLE standard deviation s.
Click on the Evaluate button to obtain the results.
If the population standard deviation is not known, the
results will be based on calculations using the t
distribution. If the population standard deviation is known,
the results will be based on calculations using the normal
distribution.
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.
Hypothesis Testing with Statdisk
0800-HTStatdisk.doc
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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.