Twelve different video games showing substance use were observed and the duration of times ofgame play {in seconds} are listed below. The design of the studvjustities The assumption that the sample can be treated as a simple random sample. Use the sample data to constmct an 30% condence interval estimate ot D', the standard deviation of the duration times of game play. Assume that this sample was obtained from a population with a normal distribution. 4,423 4,351 4,295 4,524 4,282 4,931] g. 4,393 3,914 4,251 4,25? 4,354 4,152 a Click the icon to view the table of lCh'quuare critical values. The condence interval estimate is D sec