QUESTION 1 In 2012, the instrument group of National Chemical decided to change from a modest advertising effort aimed at generating leads for its...

Please: (1) indicate the type of experiment design that is being used, (2) briefly discuss the threats to internal and external validity and identify those you regard as the most serious, and (3) describe how you could improve the design to overcome the problems u have identified.

QUESTION 1 In 2012, the instrument group of National Chemical decided to change from a modest advertising effort aimedat generating leads for its sales force to a more substantial program aimed at increased awareness andpreference. A major vehicle for this campaign was Chemical Process Instrumentation, a leading trademagazine. To evaluate the advertising, a survey was made of the readers of that magazine before and after theone-year campaign. In each case a systematic sample of 2,500 readers was sent questionnaires. Responses wereobtained from 572 for the before sample and 513 for the after sample. Among the questions were . List the companies you consider to be the leading manufacturers of the following products.. Check the one manufacturer (for each product) that you would first consider when purchasing the item. The results showed —--Percenta e aware of National 23 46Chemica Percentage prefer National 11Chemlca The results were averaged across the major products carried by National Chemical. Please: (1) indicate the type of experiment design that is being used, (2) briefly discuss thethreats to internal and external validity and identify those you regard as the most serious, and(3) describe how you could improve the design to overcome the problems u have identified.