can i get the right answers with explanation please Use the following informatio

Question

can i get the right answers with explanation please

Use the following information to answer the next five exercises. Studies are often done by pharmaceutical companies to determine the effectiveness of a treatment program. Suppose that a new AIDS antibody drug is currently under study. It is given to patients once the AIDS symptoms have revealed themselves. Of interest is the average (mean) length of time in Andrew Gelman, "Open Data and Open Methods." Ethics and Statistics, http://www.stat.columbia.edu/~gelman/research/published/ChanceEthicsl.pdf (accessed May 1, 2013). months patients live once they start the treatment. Two researchers each follow a different set of 40 patients with AIDS from the start of treatment until their deaths. The following data (in months) are collected. Determine what the key terms refer to in the example for Researcher A. population sample parameter statistic variable

Explanation / Answer

1)

Population: the number of patients who are suffered from AIDS and taken treatment to this disease in the United States.

This number of people is called the population.

2)

Sample: Sample is the finite subset or subgroup of the population.

That is, the researcher A considers the 40 patients in the whole population in the United States who are taken treatment to the AIDS disease.

3)

Parameter: The population constant is the parameter.

That is, the parameter of interest is the researcher want to know the how many months they live after taken the treatment.

Therefore, the parameter is the mean.

4)

Statistic: The functional form of the sample observations is the statistic.

That is, the mean is calculated for the sample of observations taken by the researcher A.

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