A study of the employ of social media asked sample of 488 American adults under age of 40 and sample of 421 American adults age 40 or over about their employ of social media. Based upon their answers, each subject was assigned social media usage score on scale of 0 to 25. Higher scores point out greater usage. The subjects were selected by random digit dialing of telephone numbers. Are the situations for two-sample t inference satisfied?
a. Maybe: the SRS situations is OK but we require to look at the data to check Normality
b. No: scores in a range between 0 and 25 cant be Normal
c. Yes: the STS condition is OK and large sample sized makes the Normality condition unnecessary.