Distinguish between simple random and complex random sampling design

Match the various steps in the creative process undertaken by the ad agency for developing the campaign for wpu, to the steps in young's model of the creative process. creative process in developing wpu's campaignyoung's modelafter intensive analysis of the data and several rounds of brainstorming, the agency executives decided to take a break from this project (the wpu campaign), and instead work on a different client's project before tackling the wpu project again. using a combination of animatics and storyboards, the ad agency conducted research with a representative sample of sixty target consumers to pretest the campaign theme and the creative execution. during a brainstorming session in the creative department, a copywriter's suggestion for a slogan for wpu was recognized as an excellent central idea that could drive the campaign for wpu. the account planning, account management and creative departments at the ad agency had a series of meetings and brainstorming sessions to discuss the creative brief and the results of all the primary and secondary research done with the target consumers. the account planning and the account management groups at the ad agency conducted primary research with a representative sample of the target segment and also studied secondary research data to gain insights required for the campaign development process.

Russell's study compared gpa of those students who volunteered for academic study skills training and those who did not elect to take the training. he found that those who had the training also had higher gpa. with which validity threat should russell be most concerned?

What is a market? a. a system that allows people or companies to buy and sell products and services b. the number of companies willing to manufacture a specific product c. the ability to buy production materials in large quantities and save on costs d. a product's ability to satisfy a consumer