Question

Q1: [25 points] Identify the relevant population for the following research design, and suggest the appropriate sampling design to investigate the issues, explaining why they are appropriate, and wherever necessary, identify the population frame as wll. (i)-A company wants to investigate the initial reactions of heavy soft- drink users to a new "natural" soft-drink. (ii)-A marketer wants to generate some ideas on how women differ from men in acquiring product knowledge about clothes (ii)-An internet Service Co (Hadara) would like to know the types of internet services possessed by various age groups in Ramallah.

Answer 1

Solution:

Given that,

"(a) Precision and confidence are important issues in sampling because when we use simple data to draw inferences about the population we hope to be fairly ""on target"" have some idea of the Extent of possible error because a point estimate provides no measure of possible error. We do an interval estimate to ensure relatively accurate estimation of the population parameter statistics that have the same distribution as the sampling distribution of the mean are used in this procedure usually az or aT statistics if we want to \r\n maintain our precision while increase. Sing the confident or maintain. We need to larger sample size The closer we want the sample results the population characteristics, greater the precision required. The greater the larger sample size needed, especially when the variability in the population itself is large we estimate the population parameter based on the sample statistics, confidence denotes how certain are that our estimates. In other words, there"