Among high school teachers in the state, some are National Board Certified Teach

Question

Among high school teachers in the state, some are National Board Certified Teachers and some are not. The state Department of Public Instruction (DPI) would like to sample public high school teachers to find out the proportion of public high school teachers in the state who are National Board Certified. Below are several proposed methods of obtaining this sample. Choose the methods that would be considered good sampling methods.

Select all that apply.

Select one or more:

The researcher will go to the 10 closest public high schools in relation to the DPI central office. At each high school she will talk with all the teachers at that location.

The researcher will compile a list of all public high school teachers in the state. She will number this list and use a random number generator to pick 100 teachers.

The researcher will compile a list of all public high school mathematics teachers in the state. She will divide the list into two groups, those that have been teaching for at least 10 years, and those that have been teaching for less than 10 years. She will number these two lists and use a random number generator to pick 50 teachers from each.

The researcher will randomly select 25 schools from a list of all public high schools in the state. She then goes to each high school and talks with all the teachers at those schools.

The researcher creates a website that has the survey on it. She then sends an email to all public high school teachers in the state asking teachers to fill out the survey.

The researcher will compile an alphabetical list of all public high school teachers in the state. She will divide the list into those with last name starting with the letters A through K and those with last names starting with L-Z. She will pick the first 50 from the A-K list and the last 50 from the L-Z list.

Explanation / Answer

The researcher will compile a list of all public high school teachers in the state. She will number this list and use a random number generator to pick 100 teachers. - This is an appropriate method,as an approximate proportion can be otained.

The researcher creates a website that has the survey on it. She then sends an email to all public high school teachers in the state asking teachers to fill out the survey. - This will be the best method as exact number can be obtained.

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