t-Test and the XXXC Mobile App

Description:
The t-test is very popular â?? millions of t-tests are performed every day in the market research industry alone. The student t Test is one of the most commonly used techniques for testing a hypothesis on the basis of a difference between sample means. Explained in layman’s terms, the t test determines a probability that two populations are the same with respect to the variable tested. The t test can be performed knowing just the means, standard deviation, and number of data points. Note that the raw data must be used for the t test or any statistical test, for that matter.

The purpose of marketing research is to improve marketing and business decision making. We are going to return to CCâ??s mobile app. I want to see what type of student will use the CC mobile app. We give a questionnaire to men and women that measures on a scale of 1-7 various features they will use. 1= never use and 7=always use. We gather some sample data and observe that the two groups have different average scores. Does this represent a real difference between the two populations, or just a difference in our particular sample, which might not be representative of the true population (e.g. unlucky random sample, or convenience sampling etc.) Explain your answer.