Question

7. Using the NY Times AND one other newspaper, such as your local newspaper or USA Today, find two newspaper articles reporting the results of an opinion poll. • What information do the articles provide on the sample that was selected? • What additional information do you need to determine whether the sample was a representative one?

Answer 1

Let me explain the survey about opinion in opinion poll.

The sampling units in the survey is individual persons. Both the men and women are included in the

survey. The purpose of survey is to estimate the proportion of the things under consideration.

For this the different types of questions asked from the investigators to the persons included in the

sample. The questions of the survey is in simple form, and may not personnel.

The result based on the survey apply to the whole area, so the sample included in the survey are

taken properly. Without the proper selection of sample we get different result due to biased may

introduced in the survey. There are some method of sampling as called as random sampling which

leased unbiased estimates of population parameters.

We need to takes sample such that it represent the whole of the population. One of the

technique of selecting sample is as follows:

Divide the population into homogeneous groups based on the some characteristics of the population

as gender, income levels and so on. Then select the desire number of sample sizes from each group,

then collect all the data on the selected sample. Such type of sample are called stratified sample and

the technique of selecting sample is called stratified sampling. The stratified sampling is the best

method of collecting information which lead unbiased result of the population parameters.